12728689896 has 64 divisors (see below), whose sum is σ = 34280769600. Its totient is φ = 3915237888.

The previous prime is 12728689859. The next prime is 12728689907. The reversal of 12728689896 is 69898682721.

12728689896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1471135 + ... + 1479761.

It is an arithmetic number, because the mean of its divisors is an integer number (535637025).

Almost surely, 2^12728689896 is an apocalyptic number.

It is an amenable number.

12728689896 is an abundant number, since it is smaller than the sum of its proper divisors (21552079704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12728689896 is a wasteful number, since it uses less digits than its factorization.

12728689896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13378 (or 13374 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 66.

The spelling of 12728689896 in words is "twelve billion, seven hundred twenty-eight million, six hundred eighty-nine thousand, eight hundred ninety-six".