12686406344 has 16 divisors (see below), whose sum is σ = 23788265820. Its totient is φ = 6342868800.

The previous prime is 12686406329. The next prime is 12686406367. The reversal of 12686406344 is 44360468621.

It can be written as a sum of positive squares in 2 ways, for example, as 9987603844 + 2698802500 = 99938^2 + 51950^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12686406295 and 12686406304.

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, 205562 + ... + 260054.

Almost surely, 2^12686406344 is an apocalyptic number.

It is an amenable number.

12686406344 is a deficient number, since it is larger than the sum of its proper divisors (11101859476).

12686406344 is a wasteful number, since it uses less digits than its factorization.

12686406344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83600 (or 83596 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 12686406344 in words is "twelve billion, six hundred eighty-six million, four hundred six thousand, three hundred forty-four".