22664399209 has 9 divisors (see below), whose sum is σ = 22838395671. Its totient is φ = 22491721800.

The previous prime is 22664399207. The next prime is 22664399213. The reversal of 22664399209 is 90299346622.

The square root of 22664399209 is 150547.

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

It can be written as a sum of positive squares in only one way, i.e., 19509105625 + 3155293584 = 139675^2 + 56172^2 .

It is not a de Polignac number, because 22664399209 - 2¹ = 22664399207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22664399207) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22732099 + ... + 22733095.

It is an arithmetic number, because the mean of its divisors is an integer number (2537599519).

Almost surely, 2^22664399209 is an apocalyptic number.

22664399209 is the 150547-th square number.

22664399209 is the 75274-th centered octagonal number.

It is an amenable number.

22664399209 is a deficient number, since it is larger than the sum of its proper divisors (173996462).

22664399209 is an frugal number, since it uses more digits than its factorization.

22664399209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 22664399209 in words is "twenty-two billion, six hundred sixty-four million, three hundred ninety-nine thousand, two hundred nine".