128665697223 has 8 divisors (see below), whose sum is σ = 196062014848. Its totient is φ = 73523255544.

The previous prime is 128665697203. The next prime is 128665697233. The reversal of 128665697223 is 322796566821.

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

It is not a de Polignac number, because 128665697223 - 2⁶ = 128665697159 is a prime.

It is a super-3 number, since 3×128665697223³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128665697203) 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, 3063468961 + ... + 3063469002.

It is an arithmetic number, because the mean of its divisors is an integer number (24507751856).

Almost surely, 2^128665697223 is an apocalyptic number.

128665697223 is a deficient number, since it is larger than the sum of its proper divisors (67396317625).

128665697223 is an equidigital number, since it uses as much as digits as its factorization.

128665697223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126937973.

The product of its digits is 13063680, while the sum is 57.

The spelling of 128665697223 in words is "one hundred twenty-eight billion, six hundred sixty-five million, six hundred ninety-seven thousand, two hundred twenty-three".