256566452976 has 60 divisors (see below), whose sum is σ = 719028666720. Its totient is φ = 85403170560.

The previous prime is 256566452929. The next prime is 256566452993. The reversal of 256566452976 is 679254665652.

256566452976 is a `hidden beast` number, since 2 + 5 + 6 + 566 + 45 + 29 + 7 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1135485 + ... + 1342556.

It is an arithmetic number, because the mean of its divisors is an integer number (11983811112).

Almost surely, 2^256566452976 is an apocalyptic number.

It is an amenable number.

256566452976 is an abundant number, since it is smaller than the sum of its proper divisors (462462213744).

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

256566452976 is a wasteful number, since it uses less digits than its factorization.

256566452976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478774 (or 2478765 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 63.

The spelling of 256566452976 in words is "two hundred fifty-six billion, five hundred sixty-six million, four hundred fifty-two thousand, nine hundred seventy-six".