21652556166441 has 16 divisors (see below), whose sum is σ = 32078358069120. Its totient is φ = 14434813757520.

The previous prime is 21652556166433. The next prime is 21652556166443. The reversal of 21652556166441 is 14466165525612.

It is a happy number.

21652556166441 is a `hidden beast` number, since 2 + 1 + 6 + 525 + 5 + 6 + 16 + 64 + 41 = 666.

It is not a de Polignac number, because 21652556166441 - 2³ = 21652556166433 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21652556166443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4429570 + ... + 7932603.

It is an arithmetic number, because the mean of its divisors is an integer number (2004897379320).

Almost surely, 2^{21652556166441} is an apocalyptic number.

It is an amenable number.

21652556166441 is a deficient number, since it is larger than the sum of its proper divisors (10425801902679).

21652556166441 is a wasteful number, since it uses less digits than its factorization.

21652556166441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12427053 (or 12427047 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 54.

The spelling of 21652556166441 in words is "twenty-one trillion, six hundred fifty-two billion, five hundred fifty-six million, one hundred sixty-six thousand, four hundred forty-one".