22421624556641 has 2 divisors, whose sum is σ = 22421624556642. Its totient is φ = 22421624556640.

The previous prime is 22421624556587. The next prime is 22421624556713. The reversal of 22421624556641 is 14665542612422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16820374600225 + 5601249956416 = 4101265^2 + 2366696^2 .

It is a cyclic number.

It is not a de Polignac number, because 22421624556641 - 2¹⁴ = 22421624540257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22421624556641.

It is not a weakly prime, because it can be changed into another prime (22421624553641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210812278320 + 11210812278321.

It is an arithmetic number, because the mean of its divisors is an integer number (11210812278321).

Almost surely, 2^{22421624556641} is an apocalyptic number.

It is an amenable number.

22421624556641 is a deficient number, since it is larger than the sum of its proper divisors (1).

22421624556641 is an equidigital number, since it uses as much as digits as its factorization.

22421624556641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600, while the sum is 50.

The spelling of 22421624556641 in words is "twenty-two trillion, four hundred twenty-one billion, six hundred twenty-four million, five hundred fifty-six thousand, six hundred forty-one".