128732323855 has 8 divisors (see below), whose sum is σ = 154681787664. Its totient is φ = 102850526400.

The previous prime is 128732323849. The next prime is 128732323901. The reversal of 128732323855 is 558323237821.

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

It is a de Polignac number, because none of the positive numbers 2^k-128732323855 is a prime.

It is a super-2 number, since 2×128732323855² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128732323799 and 128732323808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16912401 + ... + 16920010.

It is an arithmetic number, because the mean of its divisors is an integer number (19335223458).

Almost surely, 2^128732323855 is an apocalyptic number.

128732323855 is a deficient number, since it is larger than the sum of its proper divisors (25949463809).

128732323855 is an equidigital number, since it uses as much as digits as its factorization.

128732323855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33833177.

The product of its digits is 2419200, while the sum is 49.

The spelling of 128732323855 in words is "one hundred twenty-eight billion, seven hundred thirty-two million, three hundred twenty-three thousand, eight hundred fifty-five".