22158861564 has 24 divisors (see below), whose sum is σ = 59090297728. Its totient is φ = 6331103280.

The previous prime is 22158861553. The next prime is 22158861581. The reversal of 22158861564 is 46516885122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131897902 + ... + 131898069.

Almost surely, 2^22158861564 is an apocalyptic number.

It is an amenable number.

22158861564 is an abundant number, since it is smaller than the sum of its proper divisors (36931436164).

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

22158861564 is a wasteful number, since it uses less digits than its factorization.

22158861564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263795985 (or 263795983 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The spelling of 22158861564 in words is "twenty-two billion, one hundred fifty-eight million, eight hundred sixty-one thousand, five hundred sixty-four".