256939650444 has 48 divisors (see below), whose sum is σ = 613596634112. Its totient is φ = 83637271872.

The previous prime is 256939650433. The next prime is 256939650467. The reversal of 256939650444 is 444056939652.

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, 2542302 + ... + 2641434.

Almost surely, 2^256939650444 is an apocalyptic number.

It is an amenable number.

256939650444 is an abundant number, since it is smaller than the sum of its proper divisors (356656983668).

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

256939650444 is a wasteful number, since it uses less digits than its factorization.

256939650444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104206 (or 104204 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 57.

The spelling of 256939650444 in words is "two hundred fifty-six billion, nine hundred thirty-nine million, six hundred fifty thousand, four hundred forty-four".