22605717538561 has 4 divisors (see below), whose sum is σ = 22605739951572. Its totient is φ = 22605695125552.

The previous prime is 22605717538543. The next prime is 22605717538571. The reversal of 22605717538561 is 16583571750622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6332976400 + 22599384562161 = 79580^2 + 4753881^2 .

It is a cyclic number.

It is not a de Polignac number, because 22605717538561 - 2⁷ = 22605717538433 is a prime.

It is a super-2 number, since 2×22605717538561² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22605717538496 and 22605717538505.

It is not an unprimeable number, because it can be changed into a prime (22605717538531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9618610 + ... + 11735803.

It is an arithmetic number, because the mean of its divisors is an integer number (5651434987893).

Almost surely, 2^{22605717538561} is an apocalyptic number.

It is an amenable number.

22605717538561 is a deficient number, since it is larger than the sum of its proper divisors (22413011).

22605717538561 is a wasteful number, since it uses less digits than its factorization.

22605717538561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22413010.

The product of its (nonzero) digits is 21168000, while the sum is 58.

The spelling of 22605717538561 in words is "twenty-two trillion, six hundred five billion, seven hundred seventeen million, five hundred thirty-eight thousand, five hundred sixty-one".