21616232035605 has 16 divisors (see below), whose sum is σ = 34586079567360. Its totient is φ = 11528620982208.

The previous prime is 21616232035553. The next prime is 21616232035669. The reversal of 21616232035605 is 50653023261612.

It is a happy number.

It is not a de Polignac number, because 21616232035605 - 2²⁵ = 21616198481173 is a prime.

It is a super-2 number, since 2×21616232035605² (a number of 27 digits) contains 22 as substring.

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, 3103791 + ... + 7270899.

It is an arithmetic number, because the mean of its divisors is an integer number (2161629972960).

Almost surely, 2^{21616232035605} is an apocalyptic number.

It is an amenable number.

21616232035605 is a deficient number, since it is larger than the sum of its proper divisors (12969847531755).

21616232035605 is a wasteful number, since it uses less digits than its factorization.

21616232035605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512940.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 21616232035605 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-two million, thirty-five thousand, six hundred five".