253716638122 has 16 divisors (see below), whose sum is σ = 384463483272. Its totient is φ = 125562931200.

The previous prime is 253716638051. The next prime is 253716638171. The reversal of 253716638122 is 221836617352.

It can be written as a sum of positive squares in 4 ways, for example, as 205817376241 + 47899261881 = 453671^2 + 218859^2 .

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, 454618 + ... + 845050.

Almost surely, 2^253716638122 is an apocalyptic number.

253716638122 is a deficient number, since it is larger than the sum of its proper divisors (130746845150).

253716638122 is a wasteful number, since it uses less digits than its factorization.

253716638122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393753.

The product of its digits is 725760, while the sum is 46.

The spelling of 253716638122 in words is "two hundred fifty-three billion, seven hundred sixteen million, six hundred thirty-eight thousand, one hundred twenty-two".