538! = 18835683594730706757920024925728057906609273883363759987772269556032555926322710681322351382020810046022536443644514320765091543040836397549366452167903951503121628596079930695634623868198765944779539130553210127661940575123306412390410199805726601154356737165298517805028896540656338036051202905817851338348750099304299891125336309187277070736678436699284289202260971159698493862899960309389962469814262402962467404933764140653148131826616953815458683625695242727606328240335748900454825804025046033180241420725895077280439255546321393371484432616974059445978658235674565297965601833906257647131344909561976870064939659560706129660476706596982949018398318187868308016650177987144569218383098995341495758482358789557913505379255539869114879588934108535788847794091334054472033778222845381457412412998967580033065630354440147165841415111224643845163838553185143507716573957735969514458002501100149504754473367723667959292783597447146007275222168766123754049644879418351760014076207711057409097064685372936279373751586936348445031560919548301225162621735375030378011239610995268197140926260021220862777622528000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
* 1238 หลัก