12728176673 has 6 divisors (see below), whose sum is σ = 12809789046. Its totient is φ = 12647080992.

The previous prime is 12728176639. The next prime is 12728176733. The reversal of 12728176673 is 37667182721.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2788684864 + 9939491809 = 52808^2 + 99697^2 .

It is not a de Polignac number, because 12728176673 - 2²⁰ = 12727128097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12728116673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 233540 + ... + 282837.

It is an arithmetic number, because the mean of its divisors is an integer number (2134964841).

Almost surely, 2^12728176673 is an apocalyptic number.

It is an amenable number.

12728176673 is a deficient number, since it is larger than the sum of its proper divisors (81612373).

12728176673 is an frugal number, since it uses more digits than its factorization.

12728176673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516691 (or 516534 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The spelling of 12728176673 in words is "twelve billion, seven hundred twenty-eight million, one hundred seventy-six thousand, six hundred seventy-three".