12856671328 has 108 divisors (see below), whose sum is σ = 28385083692. Its totient is φ = 5730278400.

The previous prime is 12856671313. The next prime is 12856671383. The reversal of 12856671328 is 82317665821.

It is a happy number.

12856671328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 3336603 + ... + 3340453.

It is an arithmetic number, because the mean of its divisors is an integer number (262824849).

Almost surely, 2^12856671328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12856671328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14192541846).

12856671328 is an abundant number, since it is smaller than the sum of its proper divisors (15528412364).

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

12856671328 is a wasteful number, since it uses less digits than its factorization.

12856671328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3889 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The spelling of 12856671328 in words is "twelve billion, eight hundred fifty-six million, six hundred seventy-one thousand, three hundred twenty-eight".