728663366825 has 24 divisors (see below), whose sum is σ = 905489515200. Its totient is φ = 581675895360.

The previous prime is 728663366819. The next prime is 728663366887. The reversal of 728663366825 is 528663366827.

It is not a de Polignac number, because 728663366825 - 2¹⁸ = 728663104681 is a prime.

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, 24057791 + ... + 24088059.

It is an arithmetic number, because the mean of its divisors is an integer number (37728729800).

Almost surely, 2^728663366825 is an apocalyptic number.

It is an amenable number.

728663366825 is a deficient number, since it is larger than the sum of its proper divisors (176826148375).

728663366825 is a wasteful number, since it uses less digits than its factorization.

728663366825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32321 (or 32316 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 62.

The spelling of 728663366825 in words is "seven hundred twenty-eight billion, six hundred sixty-three million, three hundred sixty-six thousand, eight hundred twenty-five".