871385824018 has 16 divisors (see below), whose sum is σ = 1309594900824. Its totient is φ = 434854569600.

The previous prime is 871385824007. The next prime is 871385824037. The reversal of 871385824018 is 810428583178.

It can be written as a sum of positive squares in 4 ways, for example, as 829624040569 + 41761783449 = 910837^2 + 204357^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 871385824018.

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 7 ways as a sum of consecutive naturals, for example, 4615696 + ... + 4800772.

Almost surely, 2^871385824018 is an apocalyptic number.

871385824018 is a deficient number, since it is larger than the sum of its proper divisors (438209076806).

871385824018 is a wasteful number, since it uses less digits than its factorization.

871385824018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189597.

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 871385824018 in words is "eight hundred seventy-one billion, three hundred eighty-five million, eight hundred twenty-four thousand, eighteen".