256311778632 has 64 divisors (see below), whose sum is σ = 788651633280. Its totient is φ = 67598710272.

The previous prime is 256311778631. The next prime is 256311778637. The reversal of 256311778632 is 236877113652.

256311778632 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256311778631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 58677253 + ... + 58681620.

It is an arithmetic number, because the mean of its divisors is an integer number (12322681770).

Almost surely, 2^256311778632 is an apocalyptic number.

It is an amenable number.

256311778632 is an abundant number, since it is smaller than the sum of its proper divisors (532339854648).

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

256311778632 is a wasteful number, since it uses less digits than its factorization.

256311778632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117358902 (or 117358898 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The spelling of 256311778632 in words is "two hundred fifty-six billion, three hundred eleven million, seven hundred seventy-eight thousand, six hundred thirty-two".