257158656 has 60 divisors (see below), whose sum is σ = 742190592. Its totient is φ = 85718016.

The previous prime is 257158637. The next prime is 257158661. The reversal of 257158656 is 656851752.

257158656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×257158656² = 132261148711452672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23296 + ... + 32511.

Almost surely, 2^257158656 is an apocalyptic number.

It is an amenable number.

257158656 is an abundant number, since it is smaller than the sum of its proper divisors (485031936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257158656 is an equidigital number, since it uses as much as digits as its factorization.

257158656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55831 (or 55812 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 257158656 is about 16036.1671231002. The cubic root of 257158656 is about 635.9169228142.

The spelling of 257158656 in words is "two hundred fifty-seven million, one hundred fifty-eight thousand, six hundred fifty-six".