256523320530 has 96 divisors (see below), whose sum is σ = 721219209984. Its totient is φ = 63012469248.

The previous prime is 256523320517. The next prime is 256523320541. The reversal of 256523320530 is 35023325652.

256523320530 is a `hidden beast` number, since 2 + 56 + 52 + 3 + 3 + 20 + 530 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1711732 + ... + 1855551.

It is an arithmetic number, because the mean of its divisors is an integer number (7512700104).

Almost surely, 2^256523320530 is an apocalyptic number.

256523320530 is an abundant number, since it is smaller than the sum of its proper divisors (464695889454).

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

256523320530 is a wasteful number, since it uses less digits than its factorization.

256523320530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567360 (or 3567357 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 36.

The spelling of 256523320530 in words is "two hundred fifty-six billion, five hundred twenty-three million, three hundred twenty thousand, five hundred thirty".