256331680516 has 12 divisors (see below), whose sum is σ = 474967525788. Its totient is φ = 120626673152.

The previous prime is 256331680513. The next prime is 256331680541. The reversal of 256331680516 is 615086133652.

256331680516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 226852164100 + 29479516416 = 476290^2 + 171696^2 .

It is not an unprimeable number, because it can be changed into a prime (256331680513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1884791701 + ... + 1884791836.

It is an arithmetic number, because the mean of its divisors is an integer number (39580627149).

Almost surely, 2^256331680516 is an apocalyptic number.

It is an amenable number.

256331680516 is a deficient number, since it is larger than the sum of its proper divisors (218635845272).

256331680516 is a wasteful number, since it uses less digits than its factorization.

256331680516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769583558 (or 3769583556 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 256331680516 in words is "two hundred fifty-six billion, three hundred thirty-one million, six hundred eighty thousand, five hundred sixteen".