22444544621 has 2 divisors, whose sum is σ = 22444544622. Its totient is φ = 22444544620.

The previous prime is 22444544537. The next prime is 22444544623. The reversal of 22444544621 is 12644544422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12804054025 + 9640490596 = 113155^2 + 98186^2 .

It is a cyclic number.

It is not a de Polignac number, because 22444544621 - 2¹⁴ = 22444528237 is a prime.

Together with 22444544623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22444544623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11222272310 + 11222272311.

It is an arithmetic number, because the mean of its divisors is an integer number (11222272311).

Almost surely, 2^22444544621 is an apocalyptic number.

It is an amenable number.

22444544621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22444544621 is an equidigital number, since it uses as much as digits as its factorization.

22444544621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 245760, while the sum is 38.

The spelling of 22444544621 in words is "twenty-two billion, four hundred forty-four million, five hundred forty-four thousand, six hundred twenty-one".