728625288164 has 24 divisors (see below), whose sum is σ = 1295162536248. Its totient is φ = 358620550400.

The previous prime is 728625288121. The next prime is 728625288179. The reversal of 728625288164 is 461882526827.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 655763083264 + 72862204900 = 809792^2 + 269930^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5142617 + ... + 5282400.

It is an arithmetic number, because the mean of its divisors is an integer number (53965105677).

Almost surely, 2^728625288164 is an apocalyptic number.

It is an amenable number.

728625288164 is a deficient number, since it is larger than the sum of its proper divisors (566537248084).

728625288164 is a wasteful number, since it uses less digits than its factorization.

728625288164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425295 (or 10425293 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 59.

The spelling of 728625288164 in words is "seven hundred twenty-eight billion, six hundred twenty-five million, two hundred eighty-eight thousand, one hundred sixty-four".