22637677561 has 2 divisors, whose sum is σ = 22637677562. Its totient is φ = 22637677560.

The previous prime is 22637677541. The next prime is 22637677567. The reversal of 22637677561 is 16577673622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22614445161 + 23232400 = 150381^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22637677561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22637677499 and 22637677508.

It is not a weakly prime, because it can be changed into another prime (22637677567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11318838780 + 11318838781.

It is an arithmetic number, because the mean of its divisors is an integer number (11318838781).

Almost surely, 2^22637677561 is an apocalyptic number.

It is an amenable number.

22637677561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22637677561 is an equidigital number, since it uses as much as digits as its factorization.

22637677561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 52.

The spelling of 22637677561 in words is "twenty-two billion, six hundred thirty-seven million, six hundred seventy-seven thousand, five hundred sixty-one".