256944649944 has 16 divisors (see below), whose sum is σ = 642361624920. Its totient is φ = 85648216640.

The previous prime is 256944649849. The next prime is 256944649957. The reversal of 256944649944 is 449946449652.

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, 5353013517 + ... + 5353013564.

Almost surely, 2^256944649944 is an apocalyptic number.

256944649944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256944649944 is an abundant number, since it is smaller than the sum of its proper divisors (385416974976).

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

256944649944 is a wasteful number, since it uses less digits than its factorization.

256944649944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10706027090 (or 10706027086 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 66.

The spelling of 256944649944 in words is "two hundred fifty-six billion, nine hundred forty-four million, six hundred forty-nine thousand, nine hundred forty-four".