678963839679 has 16 divisors (see below), whose sum is σ = 1006110263040. Its totient is φ = 452535501240.

The previous prime is 678963839677. The next prime is 678963839683. The reversal of 678963839679 is 976938369876.

678963839679 is a `hidden beast` number, since 6 + 7 + 89 + 6 + 383 + 96 + 79 = 666.

678963839679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678963839679 - 2¹ = 678963839677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678963839598 and 678963839607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678963839677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2857497 + ... + 3085970.

It is an arithmetic number, because the mean of its divisors is an integer number (62881891440).

Almost surely, 2^678963839679 is an apocalyptic number.

678963839679 is a deficient number, since it is larger than the sum of its proper divisors (327146423361).

678963839679 is a wasteful number, since it uses less digits than its factorization.

678963839679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5947707 (or 5947701 counting only the distinct ones).

The product of its digits is 4444263936, while the sum is 81.

The spelling of 678963839679 in words is "six hundred seventy-eight billion, nine hundred sixty-three million, eight hundred thirty-nine thousand, six hundred seventy-nine".