13217860510993 has 4 divisors (see below), whose sum is σ = 13995381717540. Its totient is φ = 12440339304448.

The previous prime is 13217860510927. The next prime is 13217860511047. The reversal of 13217860510993 is 39901506871231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9068096323584 + 4149764187409 = 3011328^2 + 2037097^2 .

It is a cyclic number.

It is not a de Polignac number, because 13217860510993 - 2²⁵ = 13217826956561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13217860510903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388760603248 + ... + 388760603281.

It is an arithmetic number, because the mean of its divisors is an integer number (3498845429385).

Almost surely, 2^{13217860510993} is an apocalyptic number.

It is an amenable number.

13217860510993 is a deficient number, since it is larger than the sum of its proper divisors (777521206547).

13217860510993 is an equidigital number, since it uses as much as digits as its factorization.

13217860510993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777521206546.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 13217860510993 in words is "thirteen trillion, two hundred seventeen billion, eight hundred sixty million, five hundred ten thousand, nine hundred ninety-three".