13686447706 has 4 divisors (see below), whose sum is σ = 20529671562. Its totient is φ = 6843223852.

The previous prime is 13686447701. The next prime is 13686447751. The reversal of 13686447706 is 60774468631.

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

It can be written as a sum of positive squares in only one way, i.e., 10871190225 + 2815257481 = 104265^2 + 53059^2 .

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 as a sum of consecutive naturals, namely, 3421611925 + ... + 3421611928.

Almost surely, 2^13686447706 is an apocalyptic number.

13686447706 is a deficient number, since it is larger than the sum of its proper divisors (6843223856).

13686447706 is an equidigital number, since it uses as much as digits as its factorization.

13686447706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843223855.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 13686447706 in words is "thirteen billion, six hundred eighty-six million, four hundred forty-seven thousand, seven hundred six".