256631677045122 has 16 divisors (see below), whose sum is σ = 514742499207072. Its totient is φ = 85297368162240.

The previous prime is 256631677045109. The next prime is 256631677045147. The reversal of 256631677045122 is 221540776136652.

It is a super-2 number, since 2×256631677045122² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61631044279 + ... + 61631048442.

It is an arithmetic number, because the mean of its divisors is an integer number (32171406200442).

Almost surely, 2^{256631677045122} is an apocalyptic number.

256631677045122 is an abundant number, since it is smaller than the sum of its proper divisors (258110822161950).

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

256631677045122 is a wasteful number, since it uses less digits than its factorization.

256631677045122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123262093073.

The product of its (nonzero) digits is 25401600, while the sum is 57.

The spelling of 256631677045122 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, six hundred seventy-seven million, forty-five thousand, one hundred twenty-two".