22687288129 has 9 divisors (see below), whose sum is σ = 24939088419. Its totient is φ = 20623301160.

The previous prime is 22687288111. The next prime is 22687288133. The reversal of 22687288129 is 92188278622.

The square root of 22687288129 is 150623.

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., 22660786225 + 26501904 = 150535^2 + 5148^2 .

It is not a de Polignac number, because 22687288129 - 2⁵ = 22687288097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22687288129.

It is not an unprimeable number, because it can be changed into a prime (22687288229) 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, 1650007 + ... + 1663699.

Almost surely, 2^22687288129 is an apocalyptic number.

22687288129 is the 150623-rd square number.

22687288129 is the 75312-nd centered octagonal number.

It is an amenable number.

22687288129 is a deficient number, since it is larger than the sum of its proper divisors (2251800290).

22687288129 is an frugal number, since it uses more digits than its factorization.

22687288129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27408 (or 13704 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 55.

The spelling of 22687288129 in words is "twenty-two billion, six hundred eighty-seven million, two hundred eighty-eight thousand, one hundred twenty-nine".