856681916298 has 64 divisors (see below), whose sum is σ = 1862551152000. Its totient is φ = 261111340800.

The previous prime is 856681916287. The next prime is 856681916323. The reversal of 856681916298 is 892619186658.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42933628 + ... + 42953576.

It is an arithmetic number, because the mean of its divisors is an integer number (29102361750).

Almost surely, 2^856681916298 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856681916298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931275576000).

856681916298 is an abundant number, since it is smaller than the sum of its proper divisors (1005869235702).

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

856681916298 is a wasteful number, since it uses less digits than its factorization.

856681916298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25127.

The product of its digits is 89579520, while the sum is 69.

The spelling of 856681916298 in words is "eight hundred fifty-six billion, six hundred eighty-one million, nine hundred sixteen thousand, two hundred ninety-eight".