22558815612 has 72 divisors (see below), whose sum is σ = 57914438400. Its totient is φ = 7402700448.

The previous prime is 22558815611. The next prime is 22558815641. The reversal of 22558815612 is 21651885522.

22558815612 is a `hidden beast` number, since 2 + 2 + 5 + 5 + 8 + 81 + 561 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22558815611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 975439 + ... + 998297.

It is an arithmetic number, because the mean of its divisors is an integer number (804367200).

Almost surely, 2^22558815612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22558815612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28957219200).

22558815612 is an abundant number, since it is smaller than the sum of its proper divisors (35355622788).

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

22558815612 is a wasteful number, since it uses less digits than its factorization.

22558815612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23295 (or 23290 counting only the distinct ones).

The product of its digits is 384000, while the sum is 45.

The spelling of 22558815612 in words is "twenty-two billion, five hundred fifty-eight million, eight hundred fifteen thousand, six hundred twelve".