22640244457 has 2 divisors, whose sum is σ = 22640244458. Its totient is φ = 22640244456.

The previous prime is 22640244449. The next prime is 22640244461. The reversal of 22640244457 is 75444204622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17452787881 + 5187456576 = 132109^2 + 72024^2 .

It is a cyclic number.

It is not a de Polignac number, because 22640244457 - 2³ = 22640244449 is a prime.

It is not a weakly prime, because it can be changed into another prime (22640244857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11320122228 + 11320122229.

It is an arithmetic number, because the mean of its divisors is an integer number (11320122229).

Almost surely, 2^22640244457 is an apocalyptic number.

It is an amenable number.

22640244457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22640244457 is an equidigital number, since it uses as much as digits as its factorization.

22640244457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 40.

The spelling of 22640244457 in words is "twenty-two billion, six hundred forty million, two hundred forty-four thousand, four hundred fifty-seven".