255813660 has 48 divisors (see below), whose sum is σ = 795866400. Its totient is φ = 68216832.

The previous prime is 255813653. The next prime is 255813713. The reversal of 255813660 is 66318552.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236325 + ... + 237404.

It is an arithmetic number, because the mean of its divisors is an integer number (16580550).

Almost surely, 2^255813660 is an apocalyptic number.

255813660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255813660 is an abundant number, since it is smaller than the sum of its proper divisors (540052740).

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

255813660 is a wasteful number, since it uses less digits than its factorization.

255813660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473747 (or 473739 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 255813660 is about 15994.1758149646. The cubic root of 255813660 is about 634.8063228132.

It can be divided in two parts, 25581 and 3660, that added together give a square (29241 = 171²).

The spelling of 255813660 in words is "two hundred fifty-five million, eight hundred thirteen thousand, six hundred sixty".