12834320856 has 128 divisors (see below), whose sum is σ = 37628236800. Its totient is φ = 3571384320.

The previous prime is 12834320839. The next prime is 12834320857. The reversal of 12834320856 is 65802343821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12834320857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5295661 + ... + 5298083.

It is an arithmetic number, because the mean of its divisors is an integer number (293970600).

Almost surely, 2^12834320856 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 12834320856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18814118400).

12834320856 is an abundant number, since it is smaller than the sum of its proper divisors (24793915944).

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

12834320856 is a wasteful number, since it uses less digits than its factorization.

12834320856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249 (or 3245 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 12834320856 in words is "twelve billion, eight hundred thirty-four million, three hundred twenty thousand, eight hundred fifty-six".