Compare 648 vs 655
| Property | 648 | 655 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 7 | 2 |
| Prime factorization | 23 × 34 | 51 × 1311 |
| Prime factorization | 2 × 2 × 2 × 3 × 3 × 3 × 3 | 5 × 131 |
| Divisors count | 20 | 4 |
| Divisors | 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648 | 1, 5, 131, 655 |
| Number of properties | 0 | 1 |
| Semiprimes | 197th | |
| Roman numberals | DCXLVIII | DCLV |
| Base 2 | 10100010002 | 10100011112 |
| Base 3 | 2200003 | 2200213 |
| Base 4 | 220204 | 220334 |
| Base 5 | 100435 | 101105 |
| Base 6 | 30006 | 30116 |
| Base 7 | 16147 | 16247 |
| Base 8 | 12108 | 12178 |
| Base 9 | 8009 | 8079 |
| Base 10 | 64810 | 65510 |
| Base 11 | 53a11 | 54611 |
| Base 12 | 46012 | 46712 |
| Base 13 | 3ab13 | 3b513 |
| Base 14 | 34414 | 34b14 |
| Base 15 | 2d315 | 2da15 |
| Base 16 | 28816 | 28f16 |