12856389008 has 20 divisors (see below), whose sum is σ = 24917517900. Its totient is φ = 6426061824.

The previous prime is 12856388947. The next prime is 12856389017. The reversal of 12856389008 is 80098365821.

It can be written as a sum of positive squares in 2 ways, for example, as 1917739264 + 10938649744 = 43792^2 + 104588^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82985 + ... + 180552.

It is an arithmetic number, because the mean of its divisors is an integer number (1245875895).

Almost surely, 2^12856389008 is an apocalyptic number.

It is an amenable number.

12856389008 is a deficient number, since it is larger than the sum of its proper divisors (12061128892).

12856389008 is a wasteful number, since it uses less digits than its factorization.

12856389008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266594 (or 266588 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 12856389008 in words is "twelve billion, eight hundred fifty-six million, three hundred eighty-nine thousand, eight".