255881808715 has 32 divisors (see below), whose sum is σ = 340188750720. Its totient is φ = 183593419776.

The previous prime is 255881808709. The next prime is 255881808769. The reversal of 255881808715 is 517808188552.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-255881808715 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255881808715.

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 31 ways as a sum of consecutive naturals, for example, 5730 + ... + 715399.

It is an arithmetic number, because the mean of its divisors is an integer number (10630898460).

Almost surely, 2^255881808715 is an apocalyptic number.

255881808715 is a deficient number, since it is larger than the sum of its proper divisors (84306942005).

255881808715 is a wasteful number, since it uses less digits than its factorization.

255881808715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721303.

The product of its (nonzero) digits is 7168000, while the sum is 58.

The spelling of 255881808715 in words is "two hundred fifty-five billion, eight hundred eighty-one million, eight hundred eight thousand, seven hundred fifteen".