851539716 has 60 divisors (see below), whose sum is σ = 2259375888. Its totient is φ = 279602928.

The previous prime is 851539691. The next prime is 851539721. The reversal of 851539716 is 617935158.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2095 + ... + 41321.

Almost surely, 2^851539716 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 851539716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129687944).

851539716 is an abundant number, since it is smaller than the sum of its proper divisors (1407836172).

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

851539716 is a wasteful number, since it uses less digits than its factorization.

851539716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39310 (or 39299 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 851539716 is about 29181.1534384781. The cubic root of 851539716 is about 947.8398623916.

The spelling of 851539716 in words is "eight hundred fifty-one million, five hundred thirty-nine thousand, seven hundred sixteen".