21612630764016 has 30 divisors (see below), whose sum is σ = 60485348596920. Its totient is φ = 7204210254624.

The previous prime is 21612630764009. The next prime is 21612630764017. The reversal of 21612630764016 is 61046703621612.

21612630764016 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 2 + 630 + 7 + 6 + 4 + 0 + 1 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612630764017) 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, 75043856676 + ... + 75043856963.

It is an arithmetic number, because the mean of its divisors is an integer number (2016178286564).

Almost surely, 2^{21612630764016} is an apocalyptic number.

It is an amenable number.

21612630764016 is an abundant number, since it is smaller than the sum of its proper divisors (38872717832904).

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

21612630764016 is a wasteful number, since it uses less digits than its factorization.

21612630764016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150087713653 (or 150087713644 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 21612630764016 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty million, seven hundred sixty-four thousand, sixteen".