22564040549 has 2 divisors, whose sum is σ = 22564040550. Its totient is φ = 22564040548.

The previous prime is 22564040503. The next prime is 22564040557. The reversal of 22564040549 is 94504046522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15247804324 + 7316236225 = 123482^2 + 85535^2 .

It is a cyclic number.

It is not a de Polignac number, because 22564040549 - 2⁸ = 22564040293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22564040249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11282020274 + 11282020275.

It is an arithmetic number, because the mean of its divisors is an integer number (11282020275).

Almost surely, 2^22564040549 is an apocalyptic number.

It is an amenable number.

22564040549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22564040549 is an equidigital number, since it uses as much as digits as its factorization.

22564040549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 22564040549 in words is "twenty-two billion, five hundred sixty-four million, forty thousand, five hundred forty-nine".