12243889761617 has 2 divisors, whose sum is σ = 12243889761618. Its totient is φ = 12243889761616.

The previous prime is 12243889761557. The next prime is 12243889761643. The reversal of 12243889761617 is 71616798834221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11741100987841 + 502788773776 = 3426529^2 + 709076^2 .

It is an emirp because it is prime and its reverse (71616798834221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12243889761617 - 2¹⁴ = 12243889745233 is a prime.

It is not a weakly prime, because it can be changed into another prime (12243889761017) 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, 6121944880808 + 6121944880809.

It is an arithmetic number, because the mean of its divisors is an integer number (6121944880809).

Almost surely, 2^{12243889761617} is an apocalyptic number.

It is an amenable number.

12243889761617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243889761617 is an equidigital number, since it uses as much as digits as its factorization.

12243889761617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 65.

The spelling of 12243889761617 in words is "twelve trillion, two hundred forty-three billion, eight hundred eighty-nine million, seven hundred sixty-one thousand, six hundred seventeen".