128255080525489 has 2 divisors, whose sum is σ = 128255080525490. Its totient is φ = 128255080525488.

The previous prime is 128255080525471. The next prime is 128255080525511. The reversal of 128255080525489 is 984525080552821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124496166106225 + 3758914419264 = 11157785^2 + 1938792^2 .

It is an emirp because it is prime and its reverse (984525080552821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128255080525489 - 2⁷ = 128255080525361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128255080525489.

It is not a weakly prime, because it can be changed into another prime (128255080525189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64127540262744 + 64127540262745.

It is an arithmetic number, because the mean of its divisors is an integer number (64127540262745).

Almost surely, 2^{128255080525489} is an apocalyptic number.

It is an amenable number.

128255080525489 is a deficient number, since it is larger than the sum of its proper divisors (1).

128255080525489 is an equidigital number, since it uses as much as digits as its factorization.

128255080525489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160000, while the sum is 64.

The spelling of 128255080525489 in words is "one hundred twenty-eight trillion, two hundred fifty-five billion, eighty million, five hundred twenty-five thousand, four hundred eighty-nine".