679399568784 has 80 divisors (see below), whose sum is σ = 1976842571200. Its totient is φ = 223364231424.

The previous prime is 679399568777. The next prime is 679399568849. The reversal of 679399568784 is 487865993976.

679399568784 is a `hidden beast` number, since 6 + 79 + 399 + 5 + 6 + 87 + 84 = 666.

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, 10740274 + ... + 10803345.

It is an arithmetic number, because the mean of its divisors is an integer number (24710532140).

Almost surely, 2^679399568784 is an apocalyptic number.

It is an amenable number.

679399568784 is an abundant number, since it is smaller than the sum of its proper divisors (1297443002416).

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

679399568784 is a wasteful number, since it uses less digits than its factorization.

679399568784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21543709 (or 21543697 counting only the distinct ones).

The product of its digits is 4938071040, while the sum is 81.

The spelling of 679399568784 in words is "six hundred seventy-nine billion, three hundred ninety-nine million, five hundred sixty-eight thousand, seven hundred eighty-four".