22244340661 has 2 divisors, whose sum is σ = 22244340662. Its totient is φ = 22244340660.

The previous prime is 22244340619. The next prime is 22244340691. The reversal of 22244340661 is 16604344222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22053735025 + 190605636 = 148505^2 + 13806^2 .

It is a cyclic number.

It is not a de Polignac number, because 22244340661 - 2⁷ = 22244340533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22244340691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11122170330 + 11122170331.

It is an arithmetic number, because the mean of its divisors is an integer number (11122170331).

Almost surely, 2^22244340661 is an apocalyptic number.

It is an amenable number.

22244340661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22244340661 is an equidigital number, since it uses as much as digits as its factorization.

22244340661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 22244340661 its reverse (16604344222), we get a palindrome (38848684883).

The spelling of 22244340661 in words is "twenty-two billion, two hundred forty-four million, three hundred forty thousand, six hundred sixty-one".