15521111996 has 96 divisors (see below), whose sum is σ = 31582881792. Its totient is φ = 6610222080.

The previous prime is 15521111939. The next prime is 15521112037. The reversal of 15521111996 is 69911112551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16050305 + ... + 16051271.

It is an arithmetic number, because the mean of its divisors is an integer number (328988352).

Almost surely, 2^15521111996 is an apocalyptic number.

It is an amenable number.

15521111996 is an abundant number, since it is smaller than the sum of its proper divisors (16061769796).

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

15521111996 is a wasteful number, since it uses less digits than its factorization.

15521111996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1337 counting only the distinct ones).

The product of its digits is 24300, while the sum is 41.

The spelling of 15521111996 in words is "fifteen billion, five hundred twenty-one million, one hundred eleven thousand, nine hundred ninety-six".