679404121028 has 12 divisors (see below), whose sum is σ = 1193015088300. Its totient is φ = 338542667232.

The previous prime is 679404121001. The next prime is 679404121043. The reversal of 679404121028 is 820121404976.

679404121028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 640771432324 + 38632688704 = 800482^2 + 196552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 679404121028.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289847003 + ... + 289849346.

It is an arithmetic number, because the mean of its divisors is an integer number (99417924025).

Almost surely, 2^679404121028 is an apocalyptic number.

It is an amenable number.

679404121028 is a deficient number, since it is larger than the sum of its proper divisors (513610967272).

679404121028 is a wasteful number, since it uses less digits than its factorization.

679404121028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579696646 (or 579696644 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 679404121028 in words is "six hundred seventy-nine billion, four hundred four million, one hundred twenty-one thousand, twenty-eight".