22565354063561 has 2 divisors, whose sum is σ = 22565354063562. Its totient is φ = 22565354063560.

The previous prime is 22565354063509. The next prime is 22565354063563. The reversal of 22565354063561 is 16536045356522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14102165431225 + 8463188632336 = 3755285^2 + 2909156^2 .

It is a cyclic number.

It is not a de Polignac number, because 22565354063561 - 2²⁶ = 22565286954697 is a prime.

Together with 22565354063563, 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 (22565354063563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11282677031780 + 11282677031781.

It is an arithmetic number, because the mean of its divisors is an integer number (11282677031781).

Almost surely, 2^{22565354063561} is an apocalyptic number.

It is an amenable number.

22565354063561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22565354063561 is an equidigital number, since it uses as much as digits as its factorization.

22565354063561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440000, while the sum is 53.

The spelling of 22565354063561 in words is "twenty-two trillion, five hundred sixty-five billion, three hundred fifty-four million, sixty-three thousand, five hundred sixty-one".