255616856 has 48 divisors (see below), whose sum is σ = 529026120. Its totient is φ = 115702400.

The previous prime is 255616853. The next prime is 255616909. The reversal of 255616856 is 658616552.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255616853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335516 + ... + 336276.

Almost surely, 2^255616856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255616856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264513060).

255616856 is an abundant number, since it is smaller than the sum of its proper divisors (273409264).

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

255616856 is a wasteful number, since it uses less digits than its factorization.

255616856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1121 counting only the distinct ones).

The product of its digits is 432000, while the sum is 44.

The square root of 255616856 is about 15988.0222666845. The cubic root of 255616856 is about 634.6434901285.

The spelling of 255616856 in words is "two hundred fifty-five million, six hundred sixteen thousand, eight hundred fifty-six".