The folowing table expresses '1645' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR11 | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 11001101101 | 111 | 11,10 | 1 | |||||||
| 3 | 2020221 | 100 | 1 | ||||||||
| 4 | 121231 | 22,10 | 1 | ||||||||
| 5 | 23040 | 14,10 | 1 | ||||||||
| 6 | 11341 | 14 | 5 | ||||||||
| 7 | 4540 | 16,10 | 1 | ||||||||
| 8 | 3155 | 16 | 7 | ||||||||
| 9 | 2227 | 14 | 5 | ||||||||
| 10 | 1645 | 16 | 7 | ||||||||
| 11 | 1266 | 14 | 5 | ||||||||
| 12 | B51 | 15 | 6 | ||||||||
| 13 | 997 | 1C,10 | 1 | ||||||||
| 14 | 857 | 16 | 7 | ||||||||
| 15 | 74A | 16 | 7 | ||||||||
| 16 | 66D | 19 | A |
Factors: 5 * 7 * 47