13686447705 has 64 divisors (see below), whose sum is σ = 25909936128. Its totient is φ = 6039498240.

The previous prime is 13686447701. The next prime is 13686447751. The reversal of 13686447705 is 50774468631.

It is a happy number.

It is not a de Polignac number, because 13686447705 - 2² = 13686447701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13686447701) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 341260 + ... + 379250.

It is an arithmetic number, because the mean of its divisors is an integer number (404842752).

Almost surely, 2^13686447705 is an apocalyptic number.

13686447705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13686447705 is a deficient number, since it is larger than the sum of its proper divisors (12223488423).

13686447705 is a wasteful number, since it uses less digits than its factorization.

13686447705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38126.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 13686447705 in words is "thirteen billion, six hundred eighty-six million, four hundred forty-seven thousand, seven hundred five".