22209965944457 has 2 divisors, whose sum is σ = 22209965944458. Its totient is φ = 22209965944456.

The previous prime is 22209965944391. The next prime is 22209965944459. The reversal of 22209965944457 is 75444956990222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21971915631241 + 238050313216 = 4687421^2 + 487904^2 .

It is a cyclic number.

It is not a de Polignac number, because 22209965944457 - 2²² = 22209961750153 is a prime.

Together with 22209965944459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22209965944459) 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, 11104982972228 + 11104982972229.

It is an arithmetic number, because the mean of its divisors is an integer number (11104982972229).

Almost surely, 2^{22209965944457} is an apocalyptic number.

It is an amenable number.

22209965944457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22209965944457 is an equidigital number, since it uses as much as digits as its factorization.

22209965944457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 391910400, while the sum is 68.

The spelling of 22209965944457 in words is "twenty-two trillion, two hundred nine billion, nine hundred sixty-five million, nine hundred forty-four thousand, four hundred fifty-seven".