12686959442 has 16 divisors (see below), whose sum is σ = 19135929240. Its totient is φ = 6308402688.

The previous prime is 12686959379. The next prime is 12686959447. The reversal of 12686959442 is 24495968621.

12686959442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7160375161 + 5526584281 = 84619^2 + 74341^2 .

It is not an unprimeable number, because it can be changed into a prime (12686959447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278498 + ... + 320834.

Almost surely, 2^12686959442 is an apocalyptic number.

12686959442 is a deficient number, since it is larger than the sum of its proper divisors (6448969798).

12686959442 is a wasteful number, since it uses less digits than its factorization.

12686959442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43165.

The product of its digits is 7464960, while the sum is 56.

The spelling of 12686959442 in words is "twelve billion, six hundred eighty-six million, nine hundred fifty-nine thousand, four hundred forty-two".