21616163515832 has 32 divisors (see below), whose sum is σ = 41090121378480. Its totient is φ = 10658831005440.

The previous prime is 21616163515823. The next prime is 21616163515847. The reversal of 21616163515832 is 23851536161612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3151643 + ... + 7291445.

Almost surely, 2^{21616163515832} is an apocalyptic number.

It is an amenable number.

21616163515832 is a deficient number, since it is larger than the sum of its proper divisors (19473957862648).

21616163515832 is a wasteful number, since it uses less digits than its factorization.

21616163515832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4148823 (or 4148819 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 50.

The spelling of 21616163515832 in words is "twenty-one trillion, six hundred sixteen billion, one hundred sixty-three million, five hundred fifteen thousand, eight hundred thirty-two".