22599409561 has 27 divisors (see below), whose sum is σ = 24777026589. Its totient is φ = 20608576128.

The previous prime is 22599409559. The next prime is 22599409577. The reversal of 22599409561 is 16590499522.

The square root of 22599409561 is 150331.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10512605961 + 12086803600 = 102531^2 + 109940^2 .

It is not a de Polignac number, because 22599409561 - 2¹ = 22599409559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22599409499 and 22599409508.

It is not an unprimeable number, because it can be changed into a prime (22599409061) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 94558080 + ... + 94558318.

Almost surely, 2^22599409561 is an apocalyptic number.

22599409561 is the 150331-st square number.

22599409561 is the 75166-th centered octagonal number.

It is an amenable number.

22599409561 is a deficient number, since it is larger than the sum of its proper divisors (2177617028).

22599409561 is an frugal number, since it uses more digits than its factorization.

22599409561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 22599409561 in words is "twenty-two billion, five hundred ninety-nine million, four hundred nine thousand, five hundred sixty-one".