255653685 has 64 divisors (see below), whose sum is σ = 524966400. Its totient is φ = 115623936.

The previous prime is 255653681. The next prime is 255653689. The reversal of 255653685 is 586356552.

255653685 is a `hidden beast` number, since 2 + 5 + 565 + 3 + 6 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (255653681) and next prime (255653689).

It is not a de Polignac number, because 255653685 - 2² = 255653681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255653685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255653681) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 90271 + ... + 93059.

It is an arithmetic number, because the mean of its divisors is an integer number (8202600).

Almost surely, 2^255653685 is an apocalyptic number.

It is an amenable number.

255653685 is an abundant number, since it is smaller than the sum of its proper divisors (269312715).

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

255653685 is a wasteful number, since it uses less digits than its factorization.

255653685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907 (or 2901 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The square root of 255653685 is about 15989.1739936746. The cubic root of 255653685 is about 634.6739682472.

The spelling of 255653685 in words is "two hundred fifty-five million, six hundred fifty-three thousand, six hundred eighty-five".