13518965161397 has 2 divisors, whose sum is σ = 13518965161398. Its totient is φ = 13518965161396.

The previous prime is 13518965161393. The next prime is 13518965161433. The reversal of 13518965161397 is 79316156981531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12405547666801 + 1113417494596 = 3522151^2 + 1055186^2 .

It is a cyclic number.

It is not a de Polignac number, because 13518965161397 - 2² = 13518965161393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13518965161393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6759482580698 + 6759482580699.

It is an arithmetic number, because the mean of its divisors is an integer number (6759482580699).

Almost surely, 2^{13518965161397} is an apocalyptic number.

It is an amenable number.

13518965161397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13518965161397 is an equidigital number, since it uses as much as digits as its factorization.

13518965161397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36741600, while the sum is 65.

The spelling of 13518965161397 in words is "thirteen trillion, five hundred eighteen billion, nine hundred sixty-five million, one hundred sixty-one thousand, three hundred ninety-seven".