687243168776 has 16 divisors (see below), whose sum is σ = 1307813493840. Its totient is φ = 338492903760.

The previous prime is 687243168763. The next prime is 687243168797. The reversal of 687243168776 is 677861342786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641084510 + ... + 641085581.

It is an arithmetic number, because the mean of its divisors is an integer number (81738343365).

Almost surely, 2^687243168776 is an apocalyptic number.

It is an amenable number.

687243168776 is a deficient number, since it is larger than the sum of its proper divisors (620570325064).

687243168776 is a wasteful number, since it uses less digits than its factorization.

687243168776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282170164 (or 1282170160 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 65.

The spelling of 687243168776 in words is "six hundred eighty-seven billion, two hundred forty-three million, one hundred sixty-eight thousand, seven hundred seventy-six".