12318691997617 has 2 divisors, whose sum is σ = 12318691997618. Its totient is φ = 12318691997616.

The previous prime is 12318691997593. The next prime is 12318691997713. The reversal of 12318691997617 is 71679919681321.

12318691997617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12121044177841 + 197647819776 = 3481529^2 + 444576^2 .

It is a cyclic number.

It is not a de Polignac number, because 12318691997617 - 2²⁷ = 12318557779889 is a prime.

It is a super-2 number, since 2×12318691997617² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12318691997317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6159345998808 + 6159345998809.

It is an arithmetic number, because the mean of its divisors is an integer number (6159345998809).

Almost surely, 2^{12318691997617} is an apocalyptic number.

It is an amenable number.

12318691997617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12318691997617 is an equidigital number, since it uses as much as digits as its factorization.

12318691997617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 70.

The spelling of 12318691997617 in words is "twelve trillion, three hundred eighteen billion, six hundred ninety-one million, nine hundred ninety-seven thousand, six hundred seventeen".