851109942 has 16 divisors (see below), whose sum is σ = 1730125872. Its totient is φ = 279052320.

The previous prime is 851109901. The next prime is 851109953. The reversal of 851109942 is 249901158.

It is a self number, because there is not a number n which added to its sum of digits gives 851109942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1162353 + ... + 1163084.

It is an arithmetic number, because the mean of its divisors is an integer number (108132867).

Almost surely, 2^851109942 is an apocalyptic number.

851109942 is an abundant number, since it is smaller than the sum of its proper divisors (879015930).

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

851109942 is a wasteful number, since it uses less digits than its factorization.

851109942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325503.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 851109942 is about 29173.7886123829. The cubic root of 851109942 is about 947.6803765912.

The spelling of 851109942 in words is "eight hundred fifty-one million, one hundred nine thousand, nine hundred forty-two".