13686004705 has 4 divisors (see below), whose sum is σ = 16423205652. Its totient is φ = 10948803760.

The previous prime is 13686004699. The next prime is 13686004711. The reversal of 13686004705 is 50740068631.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (13686004699) and next prime (13686004711).

It can be written as a sum of positive squares in 2 ways, for example, as 8889472656 + 4796532049 = 94284^2 + 69257^2 .

It is not a de Polignac number, because 13686004705 - 2²¹ = 13683907553 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368600466 + ... + 1368600475.

It is an arithmetic number, because the mean of its divisors is an integer number (4105801413).

Almost surely, 2^13686004705 is an apocalyptic number.

It is an amenable number.

13686004705 is a deficient number, since it is larger than the sum of its proper divisors (2737200947).

13686004705 is an equidigital number, since it uses as much as digits as its factorization.

13686004705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737200946.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 13686004705 in words is "thirteen billion, six hundred eighty-six million, four thousand, seven hundred five".