128775579328 has 28 divisors (see below), whose sum is σ = 278769863592. Its totient is φ = 58534353920.

The previous prime is 128775579319. The next prime is 128775579341. The reversal of 128775579328 is 823975577821.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 128775579328.

It is an unprimeable number.

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, 91459225 + ... + 91460632.

Almost surely, 2^128775579328 is an apocalyptic number.

It is an amenable number.

128775579328 is an abundant number, since it is smaller than the sum of its proper divisors (149994284264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128775579328 is a wasteful number, since it uses less digits than its factorization.

128775579328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182919880 (or 182919870 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 64.

The spelling of 128775579328 in words is "one hundred twenty-eight billion, seven hundred seventy-five million, five hundred seventy-nine thousand, three hundred twenty-eight".