23057720601138 has 20 divisors (see below), whose sum is σ = 51666373939950. Its totient is φ = 7685906866992.

The previous prime is 23057720601137. The next prime is 23057720601143. The reversal of 23057720601138 is 83110602775032.

23057720601138 is a `hidden beast` number, since 2 + 3 + 0 + 5 + 7 + 7 + 2 + 0 + 601 + 1 + 38 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22132724838849 + 924995762289 = 4704543^2 + 961767^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23057720601093 and 23057720601102.

It is not an unprimeable number, because it can be changed into a prime (23057720601131) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 71165804163 + ... + 71165804486.

Almost surely, 2^{23057720601138} is an apocalyptic number.

23057720601138 is an abundant number, since it is smaller than the sum of its proper divisors (28608653338812).

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

23057720601138 is a wasteful number, since it uses less digits than its factorization.

23057720601138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142331608663 (or 142331608654 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 23057720601138 in words is "twenty-three trillion, fifty-seven billion, seven hundred twenty million, six hundred one thousand, one hundred thirty-eight".