851716800138 has 16 divisors (see below), whose sum is σ = 1704392222400. Its totient is φ = 283745829696.

The previous prime is 851716800079. The next prime is 851716800163. The reversal of 851716800138 is 831008617158.

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, 39931038 + ... + 39952361.

It is an arithmetic number, because the mean of its divisors is an integer number (106524513900).

Almost surely, 2^851716800138 is an apocalyptic number.

851716800138 is an abundant number, since it is smaller than the sum of its proper divisors (852675422262).

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

851716800138 is a wasteful number, since it uses less digits than its factorization.

851716800138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79885181.

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 851716800138 in words is "eight hundred fifty-one billion, seven hundred sixteen million, eight hundred thousand, one hundred thirty-eight".