22557232661 has 4 divisors (see below), whose sum is σ = 23335068300. Its totient is φ = 21779397024.

The previous prime is 22557232601. The next prime is 22557232699. The reversal of 22557232661 is 16623275522.

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 18138971761 + 4418260900 = 134681^2 + 66470^2 .

It is a cyclic number.

It is not a de Polignac number, because 22557232661 - 2¹⁰ = 22557231637 is a prime.

It is a super-3 number, since 3×22557232661³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22557232601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388917776 + ... + 388917833.

It is an arithmetic number, because the mean of its divisors is an integer number (5833767075).

Almost surely, 2^22557232661 is an apocalyptic number.

It is an amenable number.

22557232661 is a deficient number, since it is larger than the sum of its proper divisors (777835639).

22557232661 is an equidigital number, since it uses as much as digits as its factorization.

22557232661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777835638.

The product of its digits is 302400, while the sum is 41.

The spelling of 22557232661 in words is "twenty-two billion, five hundred fifty-seven million, two hundred thirty-two thousand, six hundred sixty-one".