728175081813 has 8 divisors (see below), whose sum is σ = 970924963008. Its totient is φ = 485437627584.

The previous prime is 728175081779. The next prime is 728175081817. The reversal of 728175081813 is 318180571827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728175081813 - 2³⁰ = 727101339989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728175081817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2969145 + ... + 3205022.

It is an arithmetic number, because the mean of its divisors is an integer number (121365620376).

Almost surely, 2^728175081813 is an apocalyptic number.

It is an amenable number.

728175081813 is a deficient number, since it is larger than the sum of its proper divisors (242749881195).

728175081813 is a wasteful number, since it uses less digits than its factorization.

728175081813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213483.

The product of its (nonzero) digits is 752640, while the sum is 51.

The spelling of 728175081813 in words is "seven hundred twenty-eight billion, one hundred seventy-five million, eighty-one thousand, eight hundred thirteen".