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165! Factorial of 165

Value of 165! i.e, Factorial of 165 =
54239106661315887749
84495014212841843821
57203794136983425672
69131165730172604765
68040329084956501555
36046503543939350954
87058155225915554489
27120741643126390781
92257035740885192863
76487014046409943976
62139185673022050034
90769429333140778955
45443758280540160000
00000000000000000000
0000000000000000



In general, the factorial of a number N = N*(N-1)*(N-2)....1
Factorial of a non-negative integer n is the product of all positive integers less than or equal to n. Factorials are commonly encountered in permutations, combinations, number theory and series expansions of trigonometric and other functions (Taylor series).

Number of trailing zeros in 165! = 40
To understand factorials, you might find it useful to read the Factorial tutorial over here.
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