22505566128 has 40 divisors (see below), whose sum is σ = 59710718448. Its totient is φ = 7299101952.

The previous prime is 22505566067. The next prime is 22505566129. The reversal of 22505566128 is 82166550522.

It is a self number, because there is not a number n which added to its sum of digits gives 22505566128.

It is not an unprimeable number, because it can be changed into a prime (22505566129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6334251 + ... + 6337802.

Almost surely, 2^22505566128 is an apocalyptic number.

It is an amenable number.

22505566128 is an abundant number, since it is smaller than the sum of its proper divisors (37205152320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22505566128 is a wasteful number, since it uses less digits than its factorization.

22505566128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12672101 (or 12672095 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 22505566128 in words is "twenty-two billion, five hundred five million, five hundred sixty-six thousand, one hundred twenty-eight".