22443543664 has 80 divisors (see below), whose sum is σ = 45565771104. Its totient is φ = 10698854400.

The previous prime is 22443543601. The next prime is 22443543673. The reversal of 22443543664 is 46634534422.

It is a self number, because there is not a number n which added to its sum of digits gives 22443543664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9838204 + ... + 9840484.

Almost surely, 2^22443543664 is an apocalyptic number.

It is an amenable number.

22443543664 is an abundant number, since it is smaller than the sum of its proper divisors (23122227440).

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

22443543664 is a wasteful number, since it uses less digits than its factorization.

22443543664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666 (or 2660 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 43.

The spelling of 22443543664 in words is "twenty-two billion, four hundred forty-three million, five hundred forty-three thousand, six hundred sixty-four".