Compare 1645 vs 1655
| Property | 1645 | 1655 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 51 × 71 × 471 | 51 × 3311 |
| Prime factorization | 5 × 7 × 47 | 5 × 331 |
| Divisors count | 8 | 4 |
| Divisors | 1, 5, 7, 35, 47, 235, 329, 1645 | 1, 5, 331, 1655 |
| Number of properties | 0 | 1 |
| Semiprimes | 477th | |
| Roman numberals | MDCXLV | MDCLV |
| Base 2 | 110011011012 | 110011101112 |
| Base 3 | 20202213 | 20210223 |
| Base 4 | 1212314 | 1213134 |
| Base 5 | 230405 | 231105 |
| Base 6 | 113416 | 113556 |
| Base 7 | 45407 | 45537 |
| Base 8 | 31558 | 31678 |
| Base 9 | 22279 | 22389 |
| Base 10 | 164510 | 165510 |
| Base 11 | 126611 | 127511 |
| Base 12 | b5112 | b5b12 |
| Base 13 | 99713 | 9a413 |
| Base 14 | 85714 | 86314 |
| Base 15 | 74a15 | 75515 |
| Base 16 | 66d16 | 67716 |