22557636809 has 2 divisors, whose sum is σ = 22557636810. Its totient is φ = 22557636808.

The previous prime is 22557636799. The next prime is 22557636811. The reversal of 22557636809 is 90863675522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20603731600 + 1953905209 = 143540^2 + 44203^2 .

It is a cyclic number.

It is not a de Polignac number, because 22557636809 - 2²⁰ = 22556588233 is a prime.

Together with 22557636811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22557636869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278818404 + 11278818405.

It is an arithmetic number, because the mean of its divisors is an integer number (11278818405).

Almost surely, 2^22557636809 is an apocalyptic number.

It is an amenable number.

22557636809 is a deficient number, since it is larger than the sum of its proper divisors (1).

22557636809 is an equidigital number, since it uses as much as digits as its factorization.

22557636809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 22557636809 in words is "twenty-two billion, five hundred fifty-seven million, six hundred thirty-six thousand, eight hundred nine".