255804863994 has 16 divisors (see below), whose sum is σ = 568455253440. Its totient is φ = 85268287980.

The previous prime is 255804863983. The next prime is 255804864013. The reversal of 255804863994 is 499368408552.

255804863994 is a `hidden beast` number, since 2 + 5 + 580 + 48 + 6 + 3 + 9 + 9 + 4 = 666.

It is a super-2 number, since 2×255804863994² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2368563502 + ... + 2368563609.

It is an arithmetic number, because the mean of its divisors is an integer number (35528453340).

Almost surely, 2^255804863994 is an apocalyptic number.

255804863994 is an abundant number, since it is smaller than the sum of its proper divisors (312650389446).

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

255804863994 is a wasteful number, since it uses less digits than its factorization.

255804863994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737127122 (or 4737127116 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 63.

The spelling of 255804863994 in words is "two hundred fifty-five billion, eight hundred four million, eight hundred sixty-three thousand, nine hundred ninety-four".