728812495871 has 4 divisors (see below), whose sum is σ = 729189534792. Its totient is φ = 728435456952.

The previous prime is 728812495799. The next prime is 728812495889. The reversal of 728812495871 is 178594218827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178594218827 = 42863 ⋅4166629.

It is a cyclic number.

It is not a de Polignac number, because 728812495871 - 2¹⁰ = 728812494847 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 (728812495171) 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, 188516561 + ... + 188520426.

It is an arithmetic number, because the mean of its divisors is an integer number (182297383698).

Almost surely, 2^728812495871 is an apocalyptic number.

728812495871 is a deficient number, since it is larger than the sum of its proper divisors (377038921).

728812495871 is a wasteful number, since it uses less digits than its factorization.

728812495871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377038920.

The product of its digits is 18063360, while the sum is 62.

The spelling of 728812495871 in words is "seven hundred twenty-eight billion, eight hundred twelve million, four hundred ninety-five thousand, eight hundred seventy-one".