256563012 has 24 divisors (see below), whose sum is σ = 599146912. Its totient is φ = 85449600.

The previous prime is 256562993. The next prime is 256563049. The reversal of 256563012 is 210365652.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7212 + ... + 23772.

Almost surely, 2^256563012 is an apocalyptic number.

It is an amenable number.

256563012 is an abundant number, since it is smaller than the sum of its proper divisors (342583900).

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

256563012 is a wasteful number, since it uses less digits than its factorization.

256563012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17859 (or 17857 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 256563012 is about 16017.5844620842. The cubic root of 256563012 is about 635.4255621728.

The spelling of 256563012 in words is "two hundred fifty-six million, five hundred sixty-three thousand, twelve".