| ||||
|---|---|---|---|---|
| Cardinal | one hundred sixty-one | |||
| Ordinal | 161st (one hundred sixty-first) | |||
| Factorization | 7 × 23 | |||
| Divisors | 1, 7, 23, 161 | |||
| Greek numeral | ΡΞΑ´ | |||
| Roman numeral | CLXI | |||
| Binary | 101000012 | |||
| Ternary | 122223 | |||
| Senary | 4256 | |||
| Octal | 2418 | |||
| Duodecimal | 11512 | |||
| Hexadecimal | A116 | |||
161 (one hundred [and] sixty-one) is the natural number following 160 and preceding 162.