22173564672 has 540 divisors, whose sum is σ = 77958998040. Its totient is φ = 6249664512.

The previous prime is 22173564671. The next prime is 22173564683. The reversal of 22173564672 is 27646537122.

22173564672 is a `hidden beast` number, since 2 + 2 + 17 + 3 + 564 + 6 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22173564671) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 141232818 + ... + 141232974.

Almost surely, 2^22173564672 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 22173564672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38979499020).

22173564672 is an abundant number, since it is smaller than the sum of its proper divisors (55785433368).

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

22173564672 is a wasteful number, since it uses less digits than its factorization.

22173564672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 308 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The spelling of 22173564672 in words is "twenty-two billion, one hundred seventy-three million, five hundred sixty-four thousand, six hundred seventy-two".