128505883327 has 4 divisors (see below), whose sum is σ = 129324392296. Its totient is φ = 127687374360.

The previous prime is 128505883309. The next prime is 128505883343. The reversal of 128505883327 is 723388505821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128505883327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128505881327) 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 3 ways as a sum of consecutive naturals, for example, 409254249 + ... + 409254562.

It is an arithmetic number, because the mean of its divisors is an integer number (32331098074).

Almost surely, 2^128505883327 is an apocalyptic number.

128505883327 is a deficient number, since it is larger than the sum of its proper divisors (818508969).

128505883327 is an equidigital number, since it uses as much as digits as its factorization.

128505883327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818508968.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 128505883327 in words is "one hundred twenty-eight billion, five hundred five million, eight hundred eighty-three thousand, three hundred twenty-seven".