687217356884 has 12 divisors (see below), whose sum is σ = 1205980322400. Its totient is φ = 342651550488.

The previous prime is 687217356829. The next prime is 687217356893. The reversal of 687217356884 is 488653712786.

It is a self number, because there is not a number n which added to its sum of digits gives 687217356884.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239280374 + ... + 239283245.

It is an arithmetic number, because the mean of its divisors is an integer number (100498360200).

Almost surely, 2^687217356884 is an apocalyptic number.

It is an amenable number.

687217356884 is a deficient number, since it is larger than the sum of its proper divisors (518762965516).

687217356884 is a wasteful number, since it uses less digits than its factorization.

687217356884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478563982 (or 478563980 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 65.

The spelling of 687217356884 in words is "six hundred eighty-seven billion, two hundred seventeen million, three hundred fifty-six thousand, eight hundred eighty-four".