255656944191 has 16 divisors (see below), whose sum is σ = 371894561280. Its totient is φ = 154931137920.

The previous prime is 255656944171. The next prime is 255656944219. The reversal of 255656944191 is 191449656552.

It is not a de Polignac number, because 255656944191 - 2⁵ = 255656944159 is a prime.

It is a super-2 number, since 2×255656944191² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255656944111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113466 + ... + 724008.

It is an arithmetic number, because the mean of its divisors is an integer number (23243410080).

Almost surely, 2^255656944191 is an apocalyptic number.

255656944191 is a deficient number, since it is larger than the sum of its proper divisors (116237617089).

255656944191 is a wasteful number, since it uses less digits than its factorization.

255656944191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623246.

The product of its digits is 11664000, while the sum is 57.

The spelling of 255656944191 in words is "two hundred fifty-five billion, six hundred fifty-six million, nine hundred forty-four thousand, one hundred ninety-one".