12728558177 has 2 divisors, whose sum is σ = 12728558178. Its totient is φ = 12728558176.

The previous prime is 12728558159. The next prime is 12728558201. The reversal of 12728558177 is 77185582721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7895388736 + 4833169441 = 88856^2 + 69521^2 .

It is a cyclic number.

It is not a de Polignac number, because 12728558177 - 2¹⁶ = 12728492641 is a prime.

It is not a weakly prime, because it can be changed into another prime (12728558477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364279088 + 6364279089.

It is an arithmetic number, because the mean of its divisors is an integer number (6364279089).

Almost surely, 2^12728558177 is an apocalyptic number.

It is an amenable number.

12728558177 is a deficient number, since it is larger than the sum of its proper divisors (1).

12728558177 is an equidigital number, since it uses as much as digits as its factorization.

12728558177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2195200, while the sum is 53.

The spelling of 12728558177 in words is "twelve billion, seven hundred twenty-eight million, five hundred fifty-eight thousand, one hundred seventy-seven".