Question

The factorial function '!' of n means:
1 x 2 x 3 x ... x n

Is there an inverse function of this?
So like if I take 6227020800, it will give me 13

Answer 1

i think nope

Answer 2

better to see other opinions

Answer 3

Also there is a graph of the function:
http://www.wolframalpha.com/input/?i=x%21

How is, say 1.5! computed?

Answer 4

! means permutation or factorial

Answer 5

are u familiar with gamma function?

Answer 6

kinda

Answer 7

I think:thenwhere x is the largest possible number such that