256975513844 has 48 divisors (see below), whose sum is σ = 539508307968. Its totient is φ = 104713153248.

The previous prime is 256975513829. The next prime is 256975513889. The reversal of 256975513844 is 448315579652.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 1087154 + ... + 1302249.

It is an arithmetic number, because the mean of its divisors is an integer number (11239756416).

Almost surely, 2^256975513844 is an apocalyptic number.

It is an amenable number.

256975513844 is an abundant number, since it is smaller than the sum of its proper divisors (282532794124).

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

256975513844 is a wasteful number, since it uses less digits than its factorization.

256975513844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389604 (or 2389602 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 59.

The spelling of 256975513844 in words is "two hundred fifty-six billion, nine hundred seventy-five million, five hundred thirteen thousand, eight hundred forty-four".