13680585389 has 4 divisors (see below), whose sum is σ = 14485325724. Its totient is φ = 12875845056.

The previous prime is 13680585349. The next prime is 13680585397. The reversal of 13680585389 is 98358508631.

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 11568723364 + 2111862025 = 107558^2 + 45955^2 .

It is a cyclic number.

It is not a de Polignac number, because 13680585389 - 2¹² = 13680581293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680585349) 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, 402370142 + ... + 402370175.

It is an arithmetic number, because the mean of its divisors is an integer number (3621331431).

Almost surely, 2^13680585389 is an apocalyptic number.

It is an amenable number.

13680585389 is a deficient number, since it is larger than the sum of its proper divisors (804740335).

13680585389 is an equidigital number, since it uses as much as digits as its factorization.

13680585389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804740334.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 13680585389 in words is "thirteen billion, six hundred eighty million, five hundred eighty-five thousand, three hundred eighty-nine".