128283955989 has 16 divisors (see below), whose sum is σ = 195721971840. Its totient is φ = 73214496000.

The previous prime is 128283955913. The next prime is 128283955993. The reversal of 128283955989 is 989559382821.

It is not a de Polignac number, because 128283955989 - 2⁷ = 128283955861 is a prime.

It is a super-3 number, since 3×128283955989³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128283155989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3758512 + ... + 3792489.

It is an arithmetic number, because the mean of its divisors is an integer number (12232623240).

Almost surely, 2^128283955989 is an apocalyptic number.

It is an amenable number.

128283955989 is a deficient number, since it is larger than the sum of its proper divisors (67438015851).

128283955989 is an equidigital number, since it uses as much as digits as its factorization.

128283955989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551820.

The product of its digits is 111974400, while the sum is 69.

The spelling of 128283955989 in words is "one hundred twenty-eight billion, two hundred eighty-three million, nine hundred fifty-five thousand, nine hundred eighty-nine".