13605682390489 has 12 divisors (see below), whose sum is σ = 16372777544100. Its totient is φ = 11259875080608.

The previous prime is 13605682390481. The next prime is 13605682390499. The reversal of 13605682390489 is 98409328650631.

It can be written as a sum of positive squares in 2 ways, for example, as 10739744894025 + 2865937496464 = 3277155^2 + 1692908^2 .

It is not a de Polignac number, because 13605682390489 - 2³ = 13605682390481 is a prime.

It is a super-2 number, since 2×13605682390489² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13605682390489.

It is not an unprimeable number, because it can be changed into a prime (13605682390481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4787360434 + ... + 4787363275.

It is an arithmetic number, because the mean of its divisors is an integer number (1364398128675).

Almost surely, 2^{13605682390489} is an apocalyptic number.

It is an amenable number.

13605682390489 is a deficient number, since it is larger than the sum of its proper divisors (2767095153611).

13605682390489 is an equidigital number, since it uses as much as digits as its factorization.

13605682390489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9574723752 (or 9574723745 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 64.

The spelling of 13605682390489 in words is "thirteen trillion, six hundred five billion, six hundred eighty-two million, three hundred ninety thousand, four hundred eighty-nine".