Compare 645 vs 648
| Property | 645 | 648 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 2 |
| Total factors | 3 | 7 |
| Prime factorization | 31 × 51 × 431 | 23 × 34 |
| Prime factorization | 3 × 5 × 43 | 2 × 2 × 2 × 3 × 3 × 3 × 3 |
| Divisors count | 8 | 20 |
| Divisors | 1, 3, 5, 15, 43, 129, 215, 645 | 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXLV | DCXLVIII |
| Base 2 | 10100001012 | 10100010002 |
| Base 3 | 2122203 | 2200003 |
| Base 4 | 220114 | 220204 |
| Base 5 | 100405 | 100435 |
| Base 6 | 25536 | 30006 |
| Base 7 | 16117 | 16147 |
| Base 8 | 12058 | 12108 |
| Base 9 | 7869 | 8009 |
| Base 10 | 64510 | 64810 |
| Base 11 | 53711 | 53a11 |
| Base 12 | 45912 | 46012 |
| Base 13 | 3a813 | 3ab13 |
| Base 14 | 34114 | 34414 |
| Base 15 | 2d015 | 2d315 |
| Base 16 | 28516 | 28816 |