128128286392269 has 16 divisors (see below), whose sum is σ = 178727988499200. Its totient is φ = 81562375696640.

The previous prime is 128128286392261. The next prime is 128128286392283. The reversal of 128128286392269 is 962293682821821.

It is a cyclic number.

It is not a de Polignac number, because 128128286392269 - 2³ = 128128286392261 is a prime.

It is a super-2 number, since 2×128128286392269² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128128286392261) 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, 11081838744 + ... + 11081850305.

It is an arithmetic number, because the mean of its divisors is an integer number (11170499281200).

Almost surely, 2^{128128286392269} is an apocalyptic number.

It is an amenable number.

128128286392269 is a deficient number, since it is larger than the sum of its proper divisors (50599702106931).

128128286392269 is a wasteful number, since it uses less digits than its factorization.

128128286392269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22163689140.

The product of its digits is 143327232, while the sum is 69.

The spelling of 128128286392269 in words is "one hundred twenty-eight trillion, one hundred twenty-eight billion, two hundred eighty-six million, three hundred ninety-two thousand, two hundred sixty-nine".