Compare 645 vs 645
| Property | 645 | 645 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 3 | 3 |
| Prime factorization | 31 × 51 × 431 | 31 × 51 × 431 |
| Prime factorization | 3 × 5 × 43 | 3 × 5 × 43 |
| Divisors count | 8 | 8 |
| Divisors | 1, 3, 5, 15, 43, 129, 215, 645 | 1, 3, 5, 15, 43, 129, 215, 645 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXLV | DCXLV |
| Base 2 | 10100001012 | 10100001012 |
| Base 3 | 2122203 | 2122203 |
| Base 4 | 220114 | 220114 |
| Base 5 | 100405 | 100405 |
| Base 6 | 25536 | 25536 |
| Base 7 | 16117 | 16117 |
| Base 8 | 12058 | 12058 |
| Base 9 | 7869 | 7869 |
| Base 10 | 64510 | 64510 |
| Base 11 | 53711 | 53711 |
| Base 12 | 45912 | 45912 |
| Base 13 | 3a813 | 3a813 |
| Base 14 | 34114 | 34114 |
| Base 15 | 2d015 | 2d015 |
| Base 16 | 28516 | 28516 |