256679652653256 has 128 divisors (see below), whose sum is σ = 734035397621760. Its totient is φ = 73270576512000.

The previous prime is 256679652653197. The next prime is 256679652653309. The reversal of 256679652653256 is 652356256976652.

It is a super-2 number, since 2×256679652653256² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861461055 + ... + 861758961.

It is an arithmetic number, because the mean of its divisors is an integer number (5734651543920).

Almost surely, 2^{256679652653256} is an apocalyptic number.

It is an amenable number.

256679652653256 is an abundant number, since it is smaller than the sum of its proper divisors (477355744968504).

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

256679652653256 is a wasteful number, since it uses less digits than its factorization.

256679652653256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302555 (or 302551 counting only the distinct ones).

The product of its digits is 7348320000, while the sum is 75.

The spelling of 256679652653256 in words is "two hundred fifty-six trillion, six hundred seventy-nine billion, six hundred fifty-two million, six hundred fifty-three thousand, two hundred fifty-six".