256500427744136 has 16 divisors (see below), whose sum is σ = 486342103167900. Its totient is φ = 126809200232704.

The previous prime is 256500427744133. The next prime is 256500427744181. The reversal of 256500427744136 is 631447724005652.

It can be written as a sum of positive squares in 2 ways, for example, as 227502741241636 + 28997686502500 = 15083194^2 + 5384950^2 .

It is not an unprimeable number, because it can be changed into a prime (256500427744133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180126704165 + ... + 180126705588.

Almost surely, 2^{256500427744136} is an apocalyptic number.

It is an amenable number.

256500427744136 is a deficient number, since it is larger than the sum of its proper divisors (229841675423764).

256500427744136 is a wasteful number, since it uses less digits than its factorization.

256500427744136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360253409848 (or 360253409844 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 56.

The spelling of 256500427744136 in words is "two hundred fifty-six trillion, five hundred billion, four hundred twenty-seven million, seven hundred forty-four thousand, one hundred thirty-six".