256474929322864 has 20 divisors (see below), whose sum is σ = 567908772072304. Its totient is φ = 109917826852608.

The previous prime is 256474929322841. The next prime is 256474929322889. The reversal of 256474929322864 is 468223929474652.

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 3 ways as a sum of consecutive naturals, for example, 1144977362937 + ... + 1144977363160.

Almost surely, 2^{256474929322864} is an apocalyptic number.

It is an amenable number.

256474929322864 is an abundant number, since it is smaller than the sum of its proper divisors (311433842749440).

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

256474929322864 is a wasteful number, since it uses less digits than its factorization.

256474929322864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289954726112 (or 2289954726106 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 73.

The spelling of 256474929322864 in words is "two hundred fifty-six trillion, four hundred seventy-four billion, nine hundred twenty-nine million, three hundred twenty-two thousand, eight hundred sixty-four".