17922296756561 has 2 divisors, whose sum is σ = 17922296756562. Its totient is φ = 17922296756560.

The previous prime is 17922296756537. The next prime is 17922296756621. The reversal of 17922296756561 is 16565769222971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17306473611025 + 615823145536 = 4160105^2 + 784744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17922296756561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17922296756491 and 17922296756500.

It is not a weakly prime, because it can be changed into another prime (17922296756261) 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, 8961148378280 + 8961148378281.

It is an arithmetic number, because the mean of its divisors is an integer number (8961148378281).

Almost surely, 2^{17922296756561} is an apocalyptic number.

It is an amenable number.

17922296756561 is a deficient number, since it is larger than the sum of its proper divisors (1).

17922296756561 is an equidigital number, since it uses as much as digits as its factorization.

17922296756561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171460800, while the sum is 68.

The spelling of 17922296756561 in words is "seventeen trillion, nine hundred twenty-two billion, two hundred ninety-six million, seven hundred fifty-six thousand, five hundred sixty-one".