Base | Representation |
---|---|
bin | 11110100101011… |
… | …01000001110000 |
3 | 122212202122220001 |
4 | 33102231001300 |
5 | 1011134430024 |
6 | 41242555344 |
7 | 6233510011 |
oct | 1722550160 |
9 | 585678801 |
10 | 256561264 |
11 | 121905303 |
12 | 71b08b54 |
13 | 411cbccb |
14 | 26107008 |
15 | 177cd244 |
hex | f4ad070 |
256561264 has 40 divisors (see below), whose sum is σ = 507467520. Its totient is φ = 125619648.
The previous prime is 256561247. The next prime is 256561307. The reversal of 256561264 is 462165652.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436779 + ... + 437365.
It is an arithmetic number, because the mean of its divisors is an integer number (12686688).
Almost surely, 2256561264 is an apocalyptic number.
It is an amenable number.
256561264 is a deficient number, since it is larger than the sum of its proper divisors (250906256).
256561264 is a wasteful number, since it uses less digits than its factorization.
256561264 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1117 (or 1111 counting only the distinct ones).
The product of its digits is 86400, while the sum is 37.
The square root of 256561264 is about 16017.5298969598. The cubic root of 256561264 is about 635.4241190882.
The spelling of 256561264 in words is "two hundred fifty-six million, five hundred sixty-one thousand, two hundred sixty-four".
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