15171668613 has 6 divisors (see below), whose sum is σ = 21914632454. Its totient is φ = 10114445736.

The previous prime is 15171668597. The next prime is 15171668651. The reversal of 15171668613 is 31686617151.

15171668613 is a `hidden beast` number, since 1 + 5 + 17 + 16 + 6 + 8 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13853760804 + 1317907809 = 117702^2 + 36303^2 .

It is not a de Polignac number, because 15171668613 - 2⁴ = 15171668597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15171668653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 842870470 + ... + 842870487.

Almost surely, 2^15171668613 is an apocalyptic number.

It is an amenable number.

15171668613 is a deficient number, since it is larger than the sum of its proper divisors (6742963841).

15171668613 is a wasteful number, since it uses less digits than its factorization.

15171668613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685740963 (or 1685740960 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The spelling of 15171668613 in words is "fifteen billion, one hundred seventy-one million, six hundred sixty-eight thousand, six hundred thirteen".