12891693080089 has 2 divisors, whose sum is σ = 12891693080090. Its totient is φ = 12891693080088.

The previous prime is 12891693079943. The next prime is 12891693080141. The reversal of 12891693080089 is 98008039619821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9401073457689 + 3490619622400 = 3066117^2 + 1868320^2 .

It is a cyclic number.

It is not a de Polignac number, because 12891693080089 - 2²⁹ = 12891156209177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12891693080089.

It is not a weakly prime, because it can be changed into another prime (12891693380089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445846540044 + 6445846540045.

It is an arithmetic number, because the mean of its divisors is an integer number (6445846540045).

Almost surely, 2^{12891693080089} is an apocalyptic number.

It is an amenable number.

12891693080089 is a deficient number, since it is larger than the sum of its proper divisors (1).

12891693080089 is an equidigital number, since it uses as much as digits as its factorization.

12891693080089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13436928, while the sum is 64.

The spelling of 12891693080089 in words is "twelve trillion, eight hundred ninety-one billion, six hundred ninety-three million, eighty thousand, eighty-nine".