255563856 has 240 divisors, whose sum is σ = 822268800. Its totient is φ = 75829248.

The previous prime is 255563837. The next prime is 255563887. The reversal of 255563856 is 658365552.

255563856 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 638 + 5 + 6 = 666.

255563856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 2871460 + ... + 2871548.

It is an arithmetic number, because the mean of its divisors is an integer number (3426120).

Almost surely, 2^255563856 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 255563856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411134400).

255563856 is an abundant number, since it is smaller than the sum of its proper divisors (566704944).

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

255563856 is a wasteful number, since it uses less digits than its factorization.

255563856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 134 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The square root of 255563856 is about 15986.3646899475. The cubic root of 255563856 is about 634.5996244376.

The spelling of 255563856 in words is "two hundred fifty-five million, five hundred sixty-three thousand, eight hundred fifty-six".