256680013122 has 24 divisors (see below), whose sum is σ = 598920031164. Its totient is φ = 78978465504.

The previous prime is 256680013111. The next prime is 256680013147. The reversal of 256680013122 is 221310086652.

256680013122 is a `hidden beast` number, since 2 + 566 + 80 + 0 + 1 + 3 + 12 + 2 = 666.

256680013122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 253179042561 + 3500970561 = 503169^2 + 59169^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 548461333 + ... + 548461800.

Almost surely, 2^256680013122 is an apocalyptic number.

256680013122 is an abundant number, since it is smaller than the sum of its proper divisors (342240018042).

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

256680013122 is a wasteful number, since it uses less digits than its factorization.

256680013122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096923154 (or 1096923151 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 256680013122 its reverse (221310086652), we get a palindrome (477990099774).

The spelling of 256680013122 in words is "two hundred fifty-six billion, six hundred eighty million, thirteen thousand, one hundred twenty-two".