22640704577 has 4 divisors (see below), whose sum is σ = 22712126676. Its totient is φ = 22569282480.

The previous prime is 22640704481. The next prime is 22640704643. The reversal of 22640704577 is 77540704622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 382750096 + 22257954481 = 19564^2 + 149191^2 .

It is a cyclic number.

It is not a de Polignac number, because 22640704577 - 2²⁸ = 22372269121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22640704277) 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, 35710574 + ... + 35711207.

It is an arithmetic number, because the mean of its divisors is an integer number (5678031669).

Almost surely, 2^22640704577 is an apocalyptic number.

It is an amenable number.

22640704577 is a deficient number, since it is larger than the sum of its proper divisors (71422099).

22640704577 is an equidigital number, since it uses as much as digits as its factorization.

22640704577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71422098.

The product of its (nonzero) digits is 658560, while the sum is 44.

The spelling of 22640704577 in words is "twenty-two billion, six hundred forty million, seven hundred four thousand, five hundred seventy-seven".