1871814826864 has 20 divisors (see below), whose sum is σ = 3626706991720. Its totient is φ = 935890441920.

The previous prime is 1871814826859. The next prime is 1871814826873. The reversal of 1871814826864 is 4686284181781.

It is a junction number, because it is equal to n+sod(n) for n = 1871814826796 and 1871814826805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125847 + ... + 1938934.

It is an arithmetic number, because the mean of its divisors is an integer number (181335349586).

Almost surely, 2^{1871814826864} is an apocalyptic number.

It is an amenable number.

1871814826864 is a deficient number, since it is larger than the sum of its proper divisors (1754892164856).

1871814826864 is a wasteful number, since it uses less digits than its factorization.

1871814826864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121448 (or 2121442 counting only the distinct ones).

The product of its digits is 33030144, while the sum is 64.

The spelling of 1871814826864 in words is "one trillion, eight hundred seventy-one billion, eight hundred fourteen million, eight hundred twenty-six thousand, eight hundred sixty-four".