255816568 has 32 divisors (see below), whose sum is σ = 553512960. Its totient is φ = 108568800.

The previous prime is 255816523. The next prime is 255816607. The reversal of 255816568 is 865618552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16408 + ... + 27943.

It is an arithmetic number, because the mean of its divisors is an integer number (17297280).

Almost surely, 2^255816568 is an apocalyptic number.

255816568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

255816568 is an abundant number, since it is smaller than the sum of its proper divisors (297696392).

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

255816568 is a wasteful number, since it uses less digits than its factorization.

255816568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44467 (or 44463 counting only the distinct ones).

The product of its digits is 576000, while the sum is 46.

The square root of 255816568 is about 15994.2667227979. The cubic root of 255816568 is about 634.8087282227.

The spelling of 255816568 in words is "two hundred fifty-five million, eight hundred sixteen thousand, five hundred sixty-eight".