22559138809 has 3 divisors (see below), whose sum is σ = 22559289007. Its totient is φ = 22558988612.

The previous prime is 22559138803. The next prime is 22559138813. The reversal of 22559138809 is 90883195522.

The square root of 22559138809 is 150197.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 11570229225 + 10988909584 = 107565^2 + 104828^2 .

It is not a de Polignac number, because 22559138809 - 2¹³ = 22559130617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22559138803) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 75099 + ... + 225295.

Almost surely, 2^22559138809 is an apocalyptic number.

22559138809 is the 150197-th square number.

22559138809 is the 75099-th centered octagonal number.

It is an amenable number.

22559138809 is a deficient number, since it is larger than the sum of its proper divisors (150198).

22559138809 is an frugal number, since it uses more digits than its factorization.

22559138809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300394 (or 150197 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 22559138809 in words is "twenty-two billion, five hundred fifty-nine million, one hundred thirty-eight thousand, eight hundred nine".