13185211663397 has 2 divisors, whose sum is σ = 13185211663398. Its totient is φ = 13185211663396.

The previous prime is 13185211663333. The next prime is 13185211663409. The reversal of 13185211663397 is 79336611258131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6992036908516 + 6193174754881 = 2644246^2 + 2488609^2 .

It is a cyclic number.

It is not a de Polignac number, because 13185211663397 - 2⁶ = 13185211663333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13185211663307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6592605831698 + 6592605831699.

It is an arithmetic number, because the mean of its divisors is an integer number (6592605831699).

Almost surely, 2^{13185211663397} is an apocalyptic number.

It is an amenable number.

13185211663397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13185211663397 is an equidigital number, since it uses as much as digits as its factorization.

13185211663397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 56.

The spelling of 13185211663397 in words is "thirteen trillion, one hundred eighty-five billion, two hundred eleven million, six hundred sixty-three thousand, three hundred ninety-seven".