871851271688 has 16 divisors (see below), whose sum is σ = 1634731213500. Its totient is φ = 435922948096.

The previous prime is 871851271633. The next prime is 871851271721. The reversal of 871851271688 is 886172158178.

It can be written as a sum of positive squares in 2 ways, for example, as 869254146244 + 2597125444 = 932338^2 + 50962^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 871851271688.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989368 + ... + 2387736.

Almost surely, 2^871851271688 is an apocalyptic number.

It is an amenable number.

871851271688 is a deficient number, since it is larger than the sum of its proper divisors (762879941812).

871851271688 is a wasteful number, since it uses less digits than its factorization.

871851271688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671944 (or 671940 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 62.

The spelling of 871851271688 in words is "eight hundred seventy-one billion, eight hundred fifty-one million, two hundred seventy-one thousand, six hundred eighty-eight".