678646389124 has 72 divisors (see below), whose sum is σ = 1347956676864. Its totient is φ = 298428715200.

The previous prime is 678646389037. The next prime is 678646389143. The reversal of 678646389124 is 421983646876.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67407939 + ... + 67418005.

It is an arithmetic number, because the mean of its divisors is an integer number (18721620512).

Almost surely, 2^678646389124 is an apocalyptic number.

It is an amenable number.

678646389124 is a deficient number, since it is larger than the sum of its proper divisors (669310287740).

678646389124 is a wasteful number, since it uses less digits than its factorization.

678646389124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14617 (or 14604 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 64.

The spelling of 678646389124 in words is "six hundred seventy-eight billion, six hundred forty-six million, three hundred eighty-nine thousand, one hundred twenty-four".