12986702185 has 4 divisors (see below), whose sum is σ = 15584042628. Its totient is φ = 10389361744.

The previous prime is 12986702167. The next prime is 12986702207. The reversal of 12986702185 is 58120768921.

It is a happy number.

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 7696903824 + 5289798361 = 87732^2 + 72731^2 .

It is a cyclic number.

It is not a de Polignac number, because 12986702185 - 2¹¹ = 12986700137 is a prime.

It is a Smith number, since the sum of its digits (49) 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, 1298670214 + ... + 1298670223.

It is an arithmetic number, because the mean of its divisors is an integer number (3896010657).

Almost surely, 2^12986702185 is an apocalyptic number.

It is an amenable number.

12986702185 is a deficient number, since it is larger than the sum of its proper divisors (2597340443).

12986702185 is an equidigital number, since it uses as much as digits as its factorization.

12986702185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597340442.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 12986702185 in words is "twelve billion, nine hundred eighty-six million, seven hundred two thousand, one hundred eighty-five".