21652560543256 has 16 divisors (see below), whose sum is σ = 40647880983600. Its totient is φ = 10813125614304.

The previous prime is 21652560543223. The next prime is 21652560543323. The reversal of 21652560543256 is 65234506525612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644325171 + ... + 1644338338.

It is an arithmetic number, because the mean of its divisors is an integer number (2540492561475).

Almost surely, 2^{21652560543256} is an apocalyptic number.

It is an amenable number.

21652560543256 is a deficient number, since it is larger than the sum of its proper divisors (18995320440344).

21652560543256 is a wasteful number, since it uses less digits than its factorization.

21652560543256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288664338 (or 3288664334 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 52.

The spelling of 21652560543256 in words is "twenty-one trillion, six hundred fifty-two billion, five hundred sixty million, five hundred forty-three thousand, two hundred fifty-six".