128568385169 has 8 divisors (see below), whose sum is σ = 146940147648. Its totient is φ = 110197835280.

The previous prime is 128568385117. The next prime is 128568385171. The reversal of 128568385169 is 961583865821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128568385169 is a prime.

It is a super-2 number, since 2×128568385169² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128568385189) 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 in 7 ways as a sum of consecutive naturals, for example, 63287 + ... + 511020.

It is an arithmetic number, because the mean of its divisors is an integer number (18367518456).

Almost surely, 2^128568385169 is an apocalyptic number.

It is an amenable number.

128568385169 is a deficient number, since it is larger than the sum of its proper divisors (18371762479).

128568385169 is an equidigital number, since it uses as much as digits as its factorization.

128568385169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606295.

The product of its digits is 24883200, while the sum is 62.

The spelling of 128568385169 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, three hundred eighty-five thousand, one hundred sixty-nine".