22662644509 has 2 divisors, whose sum is σ = 22662644510. Its totient is φ = 22662644508.

The previous prime is 22662644503. The next prime is 22662644549. The reversal of 22662644509 is 90544626622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11969016409 + 10693628100 = 109403^2 + 103410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22662644509 is a prime.

It is a super-2 number, since 2×22662644509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22662644503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11331322254 + 11331322255.

It is an arithmetic number, because the mean of its divisors is an integer number (11331322255).

Almost surely, 2^22662644509 is an apocalyptic number.

It is an amenable number.

22662644509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22662644509 is an equidigital number, since it uses as much as digits as its factorization.

22662644509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 22662644509 in words is "twenty-two billion, six hundred sixty-two million, six hundred forty-four thousand, five hundred nine".