684206516904 has 64 divisors (see below), whose sum is σ = 1737806011200. Its totient is φ = 224456484864.

The previous prime is 684206516891. The next prime is 684206516933. The reversal of 684206516904 is 409615602486.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404247 + ... + 1237670.

It is an arithmetic number, because the mean of its divisors is an integer number (27153218925).

Almost surely, 2^684206516904 is an apocalyptic number.

It is an amenable number.

684206516904 is an abundant number, since it is smaller than the sum of its proper divisors (1053599494296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684206516904 is a wasteful number, since it uses less digits than its factorization.

684206516904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642202 (or 1642198 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 684206516904 in words is "six hundred eighty-four billion, two hundred six million, five hundred sixteen thousand, nine hundred four".