23157515412 has 30 divisors (see below), whose sum is σ = 60538320458. Its totient is φ = 7719171696.

The previous prime is 23157515393. The next prime is 23157515443. The reversal of 23157515412 is 21451575132.

23157515412 is a `hidden beast` number, since 2 + 31 + 575 + 1 + 54 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17968330116 + 5189185296 = 134046^2 + 72036^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35736583 + ... + 35737230.

Almost surely, 2^23157515412 is an apocalyptic number.

It is an amenable number.

23157515412 is an abundant number, since it is smaller than the sum of its proper divisors (37380805046).

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

23157515412 is a wasteful number, since it uses less digits than its factorization.

23157515412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71473829 (or 71473818 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The spelling of 23157515412 in words is "twenty-three billion, one hundred fifty-seven million, five hundred fifteen thousand, four hundred twelve".