256613027043268 has 24 divisors (see below), whose sum is σ = 535540230352512. Its totient is φ = 105195402390144.

The previous prime is 256613027043203. The next prime is 256613027043343. The reversal of 256613027043268 is 862340720316652.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199233716005 + ... + 199233717292.

It is an arithmetic number, because the mean of its divisors is an integer number (22314176264688).

Almost surely, 2^{256613027043268} is an apocalyptic number.

256613027043268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256613027043268 is an abundant number, since it is smaller than the sum of its proper divisors (278927203309244).

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

256613027043268 is a wasteful number, since it uses less digits than its factorization.

256613027043268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398467433331 (or 398467433329 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 55.

The spelling of 256613027043268 in words is "two hundred fifty-six trillion, six hundred thirteen billion, twenty-seven million, forty-three thousand, two hundred sixty-eight".