12686044328 has 16 divisors (see below), whose sum is σ = 23923828980. Its totient is φ = 6306356608.

The previous prime is 12686044321. The next prime is 12686044333. The reversal of 12686044328 is 82344068621.

It can be written as a sum of positive squares in 2 ways, for example, as 10886418244 + 1799626084 = 104338^2 + 42422^2 .

It is not an unprimeable number, because it can be changed into a prime (12686044321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4581725 + ... + 4584492.

Almost surely, 2^12686044328 is an apocalyptic number.

It is an amenable number.

12686044328 is a deficient number, since it is larger than the sum of its proper divisors (11237784652).

12686044328 is a wasteful number, since it uses less digits than its factorization.

12686044328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166396 (or 9166392 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 12686044328 in words is "twelve billion, six hundred eighty-six million, forty-four thousand, three hundred twenty-eight".