| Base | Representation |
|---|---|
| bin | 100101011111011011… |
| … | …1001110110111000100 |
| 3 | 21200210222201001222110 |
| 4 | 1022332313032313010 |
| 5 | 2304341424424111 |
| 6 | 100553030101020 |
| 7 | 5550102656355 |
| oct | 1127667166704 |
| 9 | 250728631873 |
| 10 | 80511561156 |
| 11 | 3116574a5a4 |
| 12 | 1372b1aa770 |
| 13 | 7791107220 |
| 14 | 3c7aa9dd2c |
| 15 | 216336c5a6 |
| hex | 12bedcedc4 |
80511561156 has 48 divisors (see below), whose sum is σ = 202328993664. Its totient is φ = 24770597376.
The previous prime is 80511561131. The next prime is 80511561239. The reversal of 80511561156 is 65116511508.
It is a super-2 number, since 2×805115611562 (a number of 23 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (39).
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3210940 + ... + 3235916.
It is an arithmetic number, because the mean of its divisors is an integer number (4215187368).
Almost surely, 280511561156 is an apocalyptic number.
It is an amenable number.
80511561156 is an abundant number, since it is smaller than the sum of its proper divisors (121817432508).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80511561156 is a wasteful number, since it uses less digits than its factorization.
80511561156 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 45660 (or 45658 counting only the distinct ones).
The product of its (nonzero) digits is 36000, while the sum is 39.
The spelling of 80511561156 in words is "eighty billion, five hundred eleven million, five hundred sixty-one thousand, one hundred fifty-six".
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