12289818450517 has 2 divisors, whose sum is σ = 12289818450518. Its totient is φ = 12289818450516.

The previous prime is 12289818450491. The next prime is 12289818450563. The reversal of 12289818450517 is 71505481898221.

12289818450517 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., 10797526549681 + 1492291900836 = 3285959^2 + 1221594^2 .

It is a cyclic number.

It is not a de Polignac number, because 12289818450517 - 2⁴³ = 3493725428309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12389818450517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6144909225258 + 6144909225259.

It is an arithmetic number, because the mean of its divisors is an integer number (6144909225259).

Almost surely, 2^{12289818450517} is an apocalyptic number.

It is an amenable number.

12289818450517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12289818450517 is an equidigital number, since it uses as much as digits as its factorization.

12289818450517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12902400, while the sum is 61.

The spelling of 12289818450517 in words is "twelve trillion, two hundred eighty-nine billion, eight hundred eighteen million, four hundred fifty thousand, five hundred seventeen".