255645688 has 16 divisors (see below), whose sum is σ = 479664360. Its totient is φ = 127735200.

The previous prime is 255645673. The next prime is 255645697. The reversal of 255645688 is 886546552.

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 3 ways as a sum of consecutive naturals, for example, 2398 + ... + 22738.

Almost surely, 2^255645688 is an apocalyptic number.

It is an amenable number.

255645688 is a deficient number, since it is larger than the sum of its proper divisors (224018672).

255645688 is a wasteful number, since it uses less digits than its factorization.

255645688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21918 (or 21914 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 49.

The square root of 255645688 is about 15988.9239162615. The cubic root of 255645688 is about 634.6673505179.

The spelling of 255645688 in words is "two hundred fifty-five million, six hundred forty-five thousand, six hundred eighty-eight".