180428039789 has 2 divisors, whose sum is σ = 180428039790. Its totient is φ = 180428039788.

The previous prime is 180428039773. The next prime is 180428039969. The reversal of 180428039789 is 987930824081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106148898025 + 74279141764 = 325805^2 + 272542^2 .

It is a cyclic number.

It is not a de Polignac number, because 180428039789 - 2⁴ = 180428039773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180428039719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90214019894 + 90214019895.

It is an arithmetic number, because the mean of its divisors is an integer number (90214019895).

Almost surely, 2^180428039789 is an apocalyptic number.

It is an amenable number.

180428039789 is a deficient number, since it is larger than the sum of its proper divisors (1).

180428039789 is an equidigital number, since it uses as much as digits as its factorization.

180428039789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 180428039789 in words is "one hundred eighty billion, four hundred twenty-eight million, thirty-nine thousand, seven hundred eighty-nine".