21624043160564 has 48 divisors (see below), whose sum is σ = 40910033767680. Its totient is φ = 9941875307520.

The previous prime is 21624043160557. The next prime is 21624043160597. The reversal of 21624043160564 is 46506134042612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477529604 + ... + 477574884.

It is an arithmetic number, because the mean of its divisors is an integer number (852292370160).

Almost surely, 2^{21624043160564} is an apocalyptic number.

It is an amenable number.

21624043160564 is a deficient number, since it is larger than the sum of its proper divisors (19285990607116).

21624043160564 is a wasteful number, since it uses less digits than its factorization.

21624043160564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80480 (or 80478 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 21624043160564 in words is "twenty-one trillion, six hundred twenty-four billion, forty-three million, one hundred sixty thousand, five hundred sixty-four".