22539945618 has 24 divisors (see below), whose sum is σ = 51709287708. Its totient is φ = 7071355392.

The previous prime is 22539945577. The next prime is 22539945641. The reversal of 22539945618 is 81654993522.

22539945618 is a `hidden beast` number, since 2 + 2 + 539 + 9 + 45 + 61 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21715853769 + 824091849 = 147363^2 + 28707^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36829671 + ... + 36830282.

Almost surely, 2^22539945618 is an apocalyptic number.

22539945618 is an abundant number, since it is smaller than the sum of its proper divisors (29169342090).

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

22539945618 is a wasteful number, since it uses less digits than its factorization.

22539945618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73659978 (or 73659975 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 22539945618 in words is "twenty-two billion, five hundred thirty-nine million, nine hundred forty-five thousand, six hundred eighteen".