851766918436 has 12 divisors (see below), whose sum is σ = 1703533836928. Its totient is φ = 365042965032.

The previous prime is 851766918391. The next prime is 851766918439. The reversal of 851766918436 is 634819667158.

851766918436 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (851766918439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15210123516 + ... + 15210123571.

Almost surely, 2^851766918436 is an apocalyptic number.

It is an amenable number.

851766918436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

851766918436 is a wasteful number, since it uses less digits than its factorization.

851766918436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30420247098 (or 30420247096 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 64.

The spelling of 851766918436 in words is "eight hundred fifty-one billion, seven hundred sixty-six million, nine hundred eighteen thousand, four hundred thirty-six".