128550851389 has 2 divisors, whose sum is σ = 128550851390. Its totient is φ = 128550851388.

The previous prime is 128550851357. The next prime is 128550851459. The reversal of 128550851389 is 983158055821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122783664025 + 5767187364 = 350405^2 + 75942^2 .

It is a cyclic number.

It is not a de Polignac number, because 128550851389 - 2⁵ = 128550851357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128550851309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64275425694 + 64275425695.

It is an arithmetic number, because the mean of its divisors is an integer number (64275425695).

Almost surely, 2^128550851389 is an apocalyptic number.

It is an amenable number.

128550851389 is a deficient number, since it is larger than the sum of its proper divisors (1).

128550851389 is an equidigital number, since it uses as much as digits as its factorization.

128550851389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456000, while the sum is 55.

The spelling of 128550851389 in words is "one hundred twenty-eight billion, five hundred fifty million, eight hundred fifty-one thousand, three hundred eighty-nine".