21616152644016 has 120 divisors (see below), whose sum is σ = 69144544004640. Its totient is φ = 6175403394048.

The previous prime is 21616152643963. The next prime is 21616152644029. The reversal of 21616152644016 is 61044625161612.

21616152644016 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 615 + 26 + 4 + 4 + 0 + 1 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8659866 + ... + 10873158.

It is an arithmetic number, because the mean of its divisors is an integer number (576204533372).

Almost surely, 2^{21616152644016} is an apocalyptic number.

It is an amenable number.

21616152644016 is an abundant number, since it is smaller than the sum of its proper divisors (47528391360624).

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

21616152644016 is a wasteful number, since it uses less digits than its factorization.

21616152644016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223003 (or 2222994 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 21616152644016 in words is "twenty-one trillion, six hundred sixteen billion, one hundred fifty-two million, six hundred forty-four thousand, sixteen".