256974479652 has 48 divisors (see below), whose sum is σ = 655824863232. Its totient is φ = 77667720480.

The previous prime is 256974479599. The next prime is 256974479669.

256974479652 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×256974479652² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2490928 + ... + 2592039.

It is an arithmetic number, because the mean of its divisors is an integer number (13663017984).

Almost surely, 2^256974479652 is an apocalyptic number.

256974479652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256974479652 is an abundant number, since it is smaller than the sum of its proper divisors (398850383580).

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

256974479652 is a wasteful number, since it uses less digits than its factorization.

256974479652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083368 (or 5083366 counting only the distinct ones).

The product of its digits is 228614400, while the sum is 66.

The spelling of 256974479652 in words is "two hundred fifty-six billion, nine hundred seventy-four million, four hundred seventy-nine thousand, six hundred fifty-two".