728923715519 has 4 divisors (see below), whose sum is σ = 729233766240. Its totient is φ = 728613664800.

The previous prime is 728923715491. The next prime is 728923715549. The reversal of 728923715519 is 915517329827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 915517329827 = 1367 ⋅669727381.

It is a cyclic number.

It is not a de Polignac number, because 728923715519 - 2⁸ = 728923715263 is a prime.

It is a super-2 number, since 2×728923715519² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728923715549) 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, 155021834 + ... + 155026535.

It is an arithmetic number, because the mean of its divisors is an integer number (182308441560).

Almost surely, 2^728923715519 is an apocalyptic number.

728923715519 is a deficient number, since it is larger than the sum of its proper divisors (310050721).

728923715519 is a wasteful number, since it uses less digits than its factorization.

728923715519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310050720.

The product of its digits is 9525600, while the sum is 59.

The spelling of 728923715519 in words is "seven hundred twenty-eight billion, nine hundred twenty-three million, seven hundred fifteen thousand, five hundred nineteen".