even, composite, perfect square · 64th positive integer
The number 64
64 is an even composite number. It's known as the number of squares on a chessboard; a perfect cube (4³) and a perfect sixth power. It is the 64th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 |
| Divisors | 1, 2, 4, 8, 16, 32, 64 |
| Binary | 1000000 |
| Hexadecimal | 0x40 |
| Roman numeral | LXIV |
| Digit sum | 10 |
| Properties | even, composite, perfect square |
Why 64 is notable
The number of squares on a chessboard; a perfect cube (4³) and a perfect sixth power.
Frequently asked
Is 64 a prime number?
No. 64 is composite. Its prime factorization is 2 × 2 × 2 × 2 × 2 × 2.
What are the factors of 64?
The factors (divisors) of 64 are 1, 2, 4, 8, 16, 32, 64.
What is 64 in binary?
64 in binary is 1000000. In hexadecimal it's 40.
What is 64 as a Roman numeral?
64 in Roman numerals is LXIV.
What's the digit sum of 64?
Adding the digits of 64: 6 + 4 = 10.