21612630504164 has 24 divisors (see below), whose sum is σ = 43225683079488. Its totient is φ = 9262465486560.

The previous prime is 21612630504149. The next prime is 21612630504191. The reversal of 21612630504164 is 46140503621612.

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, 808967 + ... + 6624174.

It is an arithmetic number, because the mean of its divisors is an integer number (1801070128312).

Almost surely, 2^{21612630504164} is an apocalyptic number.

It is an amenable number.

21612630504164 is an abundant number, since it is smaller than the sum of its proper divisors (21613052575324).

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

21612630504164 is a wasteful number, since it uses less digits than its factorization.

21612630504164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536995 (or 7536993 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 21612630504164 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty million, five hundred four thousand, one hundred sixty-four".