851831836416 has 216 divisors, whose sum is σ = 2765749808640. Its totient is φ = 249803827200.

The previous prime is 851831836399. The next prime is 851831836417. The reversal of 851831836416 is 614638138158.

It is a happy number.

851831836416 is a `hidden beast` number, since 8 + 5 + 183 + 18 + 36 + 416 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851831836417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243555 + ... + 1327773.

Almost surely, 2^851831836416 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 851831836416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1382874904320).

851831836416 is an abundant number, since it is smaller than the sum of its proper divisors (1913917972224).

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

851831836416 is a wasteful number, since it uses less digits than its factorization.

851831836416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084283 (or 1084266 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 851831836416 in words is "eight hundred fifty-one billion, eight hundred thirty-one million, eight hundred thirty-six thousand, four hundred sixteen".