21652405602216 has 16 divisors (see below), whose sum is σ = 54131014005600. Its totient is φ = 7217468534064.

The previous prime is 21652405602181. The next prime is 21652405602299. The reversal of 21652405602216 is 61220650425612.

It is a happy number.

It is a super-2 number, since 2×21652405602216² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451091783356 + ... + 451091783403.

It is an arithmetic number, because the mean of its divisors is an integer number (3383188375350).

Almost surely, 2^{21652405602216} is an apocalyptic number.

It is an amenable number.

21652405602216 is an abundant number, since it is smaller than the sum of its proper divisors (32478608403384).

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

21652405602216 is a wasteful number, since it uses less digits than its factorization.

21652405602216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902183566768 (or 902183566764 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 21652405602216 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred five million, six hundred two thousand, two hundred sixteen".