22640244449 has 2 divisors, whose sum is σ = 22640244450. Its totient is φ = 22640244448.

The previous prime is 22640244311. The next prime is 22640244457. The reversal of 22640244449 is 94444204622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11477265424 + 11162979025 = 107132^2 + 105655^2 .

It is a cyclic number.

It is not a de Polignac number, because 22640244449 - 2²⁸ = 22371808993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22648244449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11320122224 + 11320122225.

It is an arithmetic number, because the mean of its divisors is an integer number (11320122225).

Almost surely, 2^22640244449 is an apocalyptic number.

It is an amenable number.

22640244449 is a deficient number, since it is larger than the sum of its proper divisors (1).

22640244449 is an equidigital number, since it uses as much as digits as its factorization.

22640244449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442368, while the sum is 41.

The spelling of 22640244449 in words is "twenty-two billion, six hundred forty million, two hundred forty-four thousand, four hundred forty-nine".