22165643504 has 20 divisors (see below), whose sum is σ = 45206247240. Its totient is φ = 10499515200.

The previous prime is 22165643503. The next prime is 22165643527. The reversal of 22165643504 is 40534656122.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22165643501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36456347 + ... + 36456954.

It is an arithmetic number, because the mean of its divisors is an integer number (2260312362).

Almost surely, 2^22165643504 is an apocalyptic number.

It is an amenable number.

22165643504 is an abundant number, since it is smaller than the sum of its proper divisors (23040603736).

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

22165643504 is a wasteful number, since it uses less digits than its factorization.

22165643504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72913328 (or 72913322 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 22165643504 in words is "twenty-two billion, one hundred sixty-five million, six hundred forty-three thousand, five hundred four".