255405164 has 24 divisors (see below), whose sum is σ = 515873568. Its totient is φ = 108374400.

The previous prime is 255405131. The next prime is 255405211. The reversal of 255405164 is 461504552.

It is a self number, because there is not a number n which added to its sum of digits gives 255405164.

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, 42329 + ... + 47984.

It is an arithmetic number, because the mean of its divisors is an integer number (21494732).

Almost surely, 2^255405164 is an apocalyptic number.

It is an amenable number.

255405164 is an abundant number, since it is smaller than the sum of its proper divisors (260468404).

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

255405164 is a wasteful number, since it uses less digits than its factorization.

255405164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90425 (or 90423 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 255405164 is about 15981.4005644061. The cubic root of 255405164 is about 634.4682460067.

The spelling of 255405164 in words is "two hundred fifty-five million, four hundred five thousand, one hundred sixty-four".