22637671561 has 2 divisors, whose sum is σ = 22637671562. Its totient is φ = 22637671560.

The previous prime is 22637671523. The next prime is 22637671577. The reversal of 22637671561 is 16517673622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16898700025 + 5738971536 = 129995^2 + 75756^2 .

It is a cyclic number.

It is not a de Polignac number, because 22637671561 - 2¹⁷ = 22637540489 is a prime.

It is not a weakly prime, because it can be changed into another prime (22637677561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11318835780 + 11318835781.

It is an arithmetic number, because the mean of its divisors is an integer number (11318835781).

Almost surely, 2^22637671561 is an apocalyptic number.

It is an amenable number.

22637671561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22637671561 is an equidigital number, since it uses as much as digits as its factorization.

22637671561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 46.

The spelling of 22637671561 in words is "twenty-two billion, six hundred thirty-seven million, six hundred seventy-one thousand, five hundred sixty-one".