6.22702 E+9
The number of permutations of 13 things taken 13 at a time is 13 factorial, or 6,227,020,800.
The value of 9 factorial plus 6 factorial is 363,600
It is 4060.
6.334 * 10^702
factorial of -1
26 factorial is 403,291,461,126,605,635,584,000,000
18 factorial is 6,402,373,705,728,000.
Zero factorial = 1
34 factorial = 295,232,799,039,604,140,847,618,609,643,520,000,000.
1 factorial = 1
27 factorial = 10,888,869,450,418,352,160,768,000,000