15661158696 has 48 divisors (see below), whose sum is σ = 42424443360. Its totient is φ = 5219302560.

The previous prime is 15661158661. The next prime is 15661158769. The reversal of 15661158696 is 69685116651.

15661158696 is a `hidden beast` number, since 1 + 56 + 6 + 1 + 1 + 586 + 9 + 6 = 666.

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, 374941 + ... + 414611.

It is an arithmetic number, because the mean of its divisors is an integer number (883842570).

Almost surely, 2^15661158696 is an apocalyptic number.

It is an amenable number.

15661158696 is an abundant number, since it is smaller than the sum of its proper divisors (26763284664).

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

15661158696 is a wasteful number, since it uses less digits than its factorization.

15661158696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45166 (or 45159 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The spelling of 15661158696 in words is "fifteen billion, six hundred sixty-one million, one hundred fifty-eight thousand, six hundred ninety-six".