257156612 has 12 divisors (see below), whose sum is σ = 451361820. Its totient is φ = 128196096.

The previous prime is 257156609. The next prime is 257156639. The reversal of 257156612 is 216651752.

257156612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 111809476 + 145347136 = 10574^2 + 12056^2 .

It is a super-2 number, since 2×257156612² = 132259046190637088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94037 + ... + 96732.

It is an arithmetic number, because the mean of its divisors is an integer number (37613485).

Almost surely, 2^257156612 is an apocalyptic number.

It is an amenable number.

257156612 is a deficient number, since it is larger than the sum of its proper divisors (194205208).

257156612 is a wasteful number, since it uses less digits than its factorization.

257156612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191110 (or 191108 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 257156612 is about 16036.1033920339. The cubic root of 257156612 is about 635.9152379689.

The spelling of 257156612 in words is "two hundred fifty-seven million, one hundred fifty-six thousand, six hundred twelve".