Compare 640155 vs 640163
| Property | 640155 | 640163 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 51 × 426771 | 6401631 |
| Prime factorization | 3 × 5 × 42677 | 640163 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 5, 15, 42677, 128031, 213385, 640155 | 1, 640163 |
| Number of properties | 0 | 4 |
| Chen primes | 20385th | |
| Isolated primes | 40826th | |
| Primes | 52091st | |
| Safe primes | 3018th | |
| Roman numberals | ||
| Base 2 | 100111000100100110112 | 100111000100101000112 |
| Base 3 | 10121120101103 | 10121120102023 |
| Base 4 | 21301021234 | 21301022034 |
| Base 5 | 1304411105 | 1304411235 |
| Base 6 | 214154036 | 214154156 |
| Base 7 | 53042257 | 53042367 |
| Base 8 | 23422338 | 23422438 |
| Base 9 | 11751139 | 11751229 |
| Base 10 | 64015510 | 64016310 |
| Base 11 | 3a7a5a11 | 3a7a6711 |
| Base 12 | 26a56312 | 26a56b12 |
| Base 13 | 1954b913 | 1954c413 |
| Base 14 | 12941514 | 12941d14 |
| Base 15 | c9a2015 | c9a2815 |
| Base 16 | 9c49b16 | 9c4a316 |