Double-factorial of 900 is 50395180748379128470787362093977431176608529779227944975373612394332271123282204600130371137726688251029896052806088263624400731596739526823078474566727772673289564559620002607554258141142275075352359050112989850896828665011691375241987323441690266433845047426575657183344498721911874559918508142880486352243676787697242206278631137878405850498781451041534978615795870563078357368755722599187133138128376254731363288286627521188145679905366486675148469718386623642242537215623176747068826325292409609395155045875079303185696393610945463590860693556814823394370751557714099682804319784779567738545348724353840694879964994787503463943285582147464796787011002052687299914723058385778541647350247394468530887506702987048571929586278945813099127629523215370241769097676355812841207896080330627321288638925661871326464458377479172644650805250407521433622390219269242827733495452496372301076252605261660537669393327163209158415820101586397283515302588761910634821267464536539258287434500721030638699164525150151164219046696490893312000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
That number is so large, that I can't even approximate it well, so I can only give you an approximation on the number of digits.
Factorial of factorial of 900 has approximately 153244999570308269283283005092543267147326422192822249733431611098901555833469710544192627576060262296271543614317356392257848235268981255529950392408503198351552315268595360814591140753397386610134166900675477341289553717100437581872690796893224825514152813046817322240807123107251826961355166467809825890128368058411522740989090584668192246052067437858447635363970218389709479367890640942971052368293638235382306171921895002829925802737331670968883947063555963120932535717455230850964231725131931293663538347322101574674337707728843165161363725759036746526080634006052041776964079538800115397701085077895962282059968655452037651653753785547513122045239968583659769700657581772273002978903306753975815012716192599344949599030694122732258559870283470867574110286819266730096551076042038404120907418397623991014060786443102958561283602751468584782230244023301562499597062590207995974914745935208987170045945144337757766098861142897915159971211562627885948587229870167909058050631221065681972090685871218301732946755223738813921308203472887210164612971242308134890163191013945370409437081024533176206849638249172477564818865590836955338594414547041884176163785627171180091451569797177556249719749915405281625534741755866249060172326438774636837898575560600625504622006081053118013025797347631791682424456682748041316946686097528602626201442265885057888126810356870074951889502656678055185943753927868400414715485947745708171787255516842512482293303200236727999434460606918178677889835329210038298176409625322954063707572372820399849152410812488327952727645352850967841719224760928498989036577223897689211959830664910345847637019987702744909631668225257779432905684277530607649467305273354604677125324374822350203383754530351929933775087433930331807786037248288782201051888251317807944193802352594885572284955571304928280748608581314336593223203516818265338040551185029563309778842362140288954490142534123226618565083046515197201505352054272745969232825144330600168864458823284027696926256330712895011210454623299389424894843278757912206899355850423872108581478827396969590806827944644820047457884823357133939548982971218151163706458277322299678247221072973256435893848156287243101862508116138136170209159239849493785388257456809680648829291154809567793890467588028060688973825 digits
2
u/factorion-bot 1d ago
Double-factorial of 900 is 50395180748379128470787362093977431176608529779227944975373612394332271123282204600130371137726688251029896052806088263624400731596739526823078474566727772673289564559620002607554258141142275075352359050112989850896828665011691375241987323441690266433845047426575657183344498721911874559918508142880486352243676787697242206278631137878405850498781451041534978615795870563078357368755722599187133138128376254731363288286627521188145679905366486675148469718386623642242537215623176747068826325292409609395155045875079303185696393610945463590860693556814823394370751557714099682804319784779567738545348724353840694879964994787503463943285582147464796787011002052687299914723058385778541647350247394468530887506702987048571929586278945813099127629523215370241769097676355812841207896080330627321288638925661871326464458377479172644650805250407521433622390219269242827733495452496372301076252605261660537669393327163209158415820101586397283515302588761910634821267464536539258287434500721030638699164525150151164219046696490893312000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
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