256677201157860 has 72 divisors (see below), whose sum is σ = 889814297351616. Its totient is φ = 58669074550080.

The previous prime is 256677201157837. The next prime is 256677201157877. The reversal of 256677201157860 is 68751102776652.

It is a happy number.

256677201157860 is a `hidden beast` number, since 2 + 56 + 6 + 7 + 7 + 2 + 0 + 1 + 1 + 578 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 101856030946 + ... + 101856033465.

Almost surely, 2^{256677201157860} is an apocalyptic number.

256677201157860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256677201157860 is an abundant number, since it is smaller than the sum of its proper divisors (633137096193756).

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

256677201157860 is a wasteful number, since it uses less digits than its factorization.

256677201157860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203712064433 (or 203712064428 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 63.

The spelling of 256677201157860 in words is "two hundred fifty-six trillion, six hundred seventy-seven billion, two hundred one million, one hundred fifty-seven thousand, eight hundred sixty".