256657077234 has 48 divisors (see below), whose sum is σ = 593762824512. Its totient is φ = 79929599904.

The previous prime is 256657077197. The next prime is 256657077241. The reversal of 256657077234 is 432770756652.

It is a happy number.

256657077234 is a `hidden beast` number, since 2 + 5 + 66 + 570 + 7 + 7 + 2 + 3 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7190857 + ... + 7226460.

It is an arithmetic number, because the mean of its divisors is an integer number (12370058844).

Almost surely, 2^256657077234 is an apocalyptic number.

256657077234 is an abundant number, since it is smaller than the sum of its proper divisors (337105747278).

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

256657077234 is a wasteful number, since it uses less digits than its factorization.

256657077234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14417391 (or 14417388 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 54.

The spelling of 256657077234 in words is "two hundred fifty-six billion, six hundred fifty-seven million, seventy-seven thousand, two hundred thirty-four".