22539064549 has 2 divisors, whose sum is σ = 22539064550. Its totient is φ = 22539064548.

The previous prime is 22539064531. The next prime is 22539064553. The reversal of 22539064549 is 94546093522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15035173924 + 7503890625 = 122618^2 + 86625^2 .

It is a cyclic number.

It is not a de Polignac number, because 22539064549 - 2¹¹ = 22539062501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22539064519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11269532274 + 11269532275.

It is an arithmetic number, because the mean of its divisors is an integer number (11269532275).

Almost surely, 2^22539064549 is an apocalyptic number.

It is an amenable number.

22539064549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22539064549 is an equidigital number, since it uses as much as digits as its factorization.

22539064549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 22539064549 in words is "twenty-two billion, five hundred thirty-nine million, sixty-four thousand, five hundred forty-nine".