255891373695 has 16 divisors (see below), whose sum is σ = 454917997920. Its totient is φ = 136475399232.

The previous prime is 255891373679. The next prime is 255891373729. The reversal of 255891373695 is 596373198552.

It is a happy number.

255891373695 is a `hidden beast` number, since 2 + 5 + 589 + 13 + 7 + 36 + 9 + 5 = 666.

It is not a de Polignac number, because 255891373695 - 2⁴ = 255891373679 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 947745694 + ... + 947745963.

It is an arithmetic number, because the mean of its divisors is an integer number (28432374870).

Almost surely, 2^255891373695 is an apocalyptic number.

255891373695 is a deficient number, since it is larger than the sum of its proper divisors (199026624225).

255891373695 is a wasteful number, since it uses less digits than its factorization.

255891373695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895491671 (or 1895491665 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 63.

The spelling of 255891373695 in words is "two hundred fifty-five billion, eight hundred ninety-one million, three hundred seventy-three thousand, six hundred ninety-five".