728715959999 has 4 divisors (see below), whose sum is σ = 735790872336. Its totient is φ = 721641047664.

The previous prime is 728715959987. The next prime is 728715960047. The reversal of 728715959999 is 999959517827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999959517827 = 770813 ⋅1297279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728715959999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728715959099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537456014 + ... + 3537456219.

It is an arithmetic number, because the mean of its divisors is an integer number (183947718084).

Almost surely, 2^728715959999 is an apocalyptic number.

728715959999 is a deficient number, since it is larger than the sum of its proper divisors (7074912337).

728715959999 is a wasteful number, since it uses less digits than its factorization.

728715959999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074912336.

The product of its digits is 1157360400, while the sum is 80.

The spelling of 728715959999 in words is "seven hundred twenty-eight billion, seven hundred fifteen million, nine hundred fifty-nine thousand, nine hundred ninety-nine".