255631668 has 24 divisors (see below), whose sum is σ = 612595872. Its totient is φ = 82907424.

The previous prime is 255631627. The next prime is 255631693. The reversal of 255631668 is 866136552.

It is a happy number.

255631668 is digitally balanced in base 2 and base 3, because in such bases 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 7 ways as a sum of consecutive naturals, for example, 287430 + ... + 288317.

It is an arithmetic number, because the mean of its divisors is an integer number (25524828).

Almost surely, 2^255631668 is an apocalyptic number.

It is an amenable number.

255631668 is an abundant number, since it is smaller than the sum of its proper divisors (356964204).

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

255631668 is a wasteful number, since it uses less digits than its factorization.

255631668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575791 (or 575789 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 255631668 is about 15988.4854817459. The cubic root of 255631668 is about 634.6557482635.

The spelling of 255631668 in words is "two hundred fifty-five million, six hundred thirty-one thousand, six hundred sixty-eight".