22572647656 has 16 divisors (see below), whose sum is σ = 45579384900. Its totient is φ = 10418145024.

The previous prime is 22572647639. The next prime is 22572647659. The reversal of 22572647656 is 65674627522.

It can be written as a sum of positive squares in 2 ways, for example, as 22340085156 + 232562500 = 149466^2 + 15250^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (22572647659) 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, 108522241 + ... + 108522448.

Almost surely, 2^22572647656 is an apocalyptic number.

22572647656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22572647656 is an abundant number, since it is smaller than the sum of its proper divisors (23006737244).

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

22572647656 is a wasteful number, since it uses less digits than its factorization.

22572647656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217044708 (or 217044704 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 52.

The spelling of 22572647656 in words is "twenty-two billion, five hundred seventy-two million, six hundred forty-seven thousand, six hundred fifty-six".