256056622464 has 32 divisors (see below), whose sum is σ = 680150404440. Its totient is φ = 85352207360.

The previous prime is 256056622447. The next prime is 256056622483. The reversal of 256056622464 is 464226650652.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333406677 + ... + 333407444.

Almost surely, 2^256056622464 is an apocalyptic number.

256056622464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256056622464 is an abundant number, since it is smaller than the sum of its proper divisors (424093781976).

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

256056622464 is an equidigital number, since it uses as much as digits as its factorization.

256056622464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666814138 (or 666814126 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 256056622464 in words is "two hundred fifty-six billion, fifty-six million, six hundred twenty-two thousand, four hundred sixty-four".