Factorial of 15 (15!)
RESULT: 1,307,674,368,000
The factorial of 15, written as 15!, is the product of all positive integers less than or equal to 15.
What Is the Formula to Calculate 15 Factorial?
The formula for calculating 15 factorial (15!) is:
15! = 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 1,307,674,368,000
How Many Digits in 15 Factorial?
The number 15! has 13 digits.
Factorial Table From 1! to 15!
| n | n! |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 720 |
| 7 | 5,040 |
| 8 | 40,320 |
| 9 | 362,880 |
| 10 | 3,628,800 |
Frequently Asked Questions
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What is 15!?
It's the product of all positive integers from 1 to 15. Answer: 1,307,674,368,000.
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Is factorial defined for negative numbers?
No. Factorials are only defined for non-negative integers (0 and up).
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What is 0!?
By definition, the factorial of 0 is 1.