22661944465 has 4 divisors (see below), whose sum is σ = 27194333364. Its totient is φ = 18129555568.

The previous prime is 22661944433. The next prime is 22661944489. The reversal of 22661944465 is 56444916622.

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 10290276481 + 12371667984 = 101441^2 + 111228^2 .

It is a cyclic number.

It is not a de Polignac number, because 22661944465 - 2⁵ = 22661944433 is a prime.

It is a Duffinian number.

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, 2266194442 + ... + 2266194451.

It is an arithmetic number, because the mean of its divisors is an integer number (6798583341).

Almost surely, 2^22661944465 is an apocalyptic number.

It is an amenable number.

22661944465 is a deficient number, since it is larger than the sum of its proper divisors (4532388899).

22661944465 is an equidigital number, since it uses as much as digits as its factorization.

22661944465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532388898.

The product of its digits is 2488320, while the sum is 49.

The spelling of 22661944465 in words is "twenty-two billion, six hundred sixty-one million, nine hundred forty-four thousand, four hundred sixty-five".