255644856 has 32 divisors (see below), whose sum is σ = 710125200. Its totient is φ = 85214880.

The previous prime is 255644843. The next prime is 255644863. The reversal of 255644856 is 658446552.

255644856 is a `hidden beast` number, since 2 + 5 + 564 + 4 + 85 + 6 = 666.

It is a congruent number.

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, 591555 + ... + 591986.

Almost surely, 2^255644856 is an apocalyptic number.

It is an amenable number.

255644856 is an abundant number, since it is smaller than the sum of its proper divisors (454480344).

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

255644856 is a wasteful number, since it uses less digits than its factorization.

255644856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183556 (or 1183546 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 255644856 is about 15988.8978982293. The cubic root of 255644856 is about 634.6666620079. Note that the first 5 decimals are identical.

The spelling of 255644856 in words is "two hundred fifty-five million, six hundred forty-four thousand, eight hundred fifty-six".