8
2.5
9 factorial = 9! = (9*8*7*6*5*4*3*2*1) = 362880
That's not the factorial of any number. For a start, the factorial of any number greater than or equal to 2 is even, because of the factor 2. The factorial of any number greater or equal to five ends with 0. Another answer: I suspect the questioner meant to ask how to write 8*7*6*5*4*3*2*1 as a factorial. If so, then the answer is "8!"
8*7*6*5*4*3*2*1 = 40320
9 x 8! = 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1So, 9 x 8! = 9! = 362,800
The value of 9 factorial plus 6 factorial is 363,600
It is 4060.
52 factorial, approximately 80.65817517E66
factorial of -1
There are 8 letters in "geometry", so there are 8! (factorial) ways to arrange them in different permutations. 8! = 40,320 permutations.
3840. It's a double factorial.