13565617232197 has 4 divisors (see below), whose sum is σ = 13565625321996. Its totient is φ = 13565609142400.

The previous prime is 13565617232191. The next prime is 13565617232287. The reversal of 13565617232197 is 79123271656531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10600715503876 + 2964901728321 = 3255874^2 + 1721889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13565617232197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13565617232191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485554 + ... + 5231347.

It is an arithmetic number, because the mean of its divisors is an integer number (3391406330499).

Almost surely, 2^{13565617232197} is an apocalyptic number.

It is an amenable number.

13565617232197 is a deficient number, since it is larger than the sum of its proper divisors (8089799).

13565617232197 is an equidigital number, since it uses as much as digits as its factorization.

13565617232197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089798.

The product of its digits is 14288400, while the sum is 58.

The spelling of 13565617232197 in words is "thirteen trillion, five hundred sixty-five billion, six hundred seventeen million, two hundred thirty-two thousand, one hundred ninety-seven".