255657688224 has 48 divisors (see below), whose sum is σ = 671424136992. Its totient is φ = 85178251008.

The previous prime is 255657688189. The next prime is 255657688243. The reversal of 255657688224 is 422886756552.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

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, 439279 + ... + 839214.

It is an arithmetic number, because the mean of its divisors is an integer number (13988002854).

Almost surely, 2^255657688224 is an apocalyptic number.

255657688224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

255657688224 is an abundant number, since it is smaller than the sum of its proper divisors (415766448768).

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

255657688224 is a wasteful number, since it uses less digits than its factorization.

255657688224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280589 (or 1280581 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 60.

The spelling of 255657688224 in words is "two hundred fifty-five billion, six hundred fifty-seven million, six hundred eighty-eight thousand, two hundred twenty-four".