128775579327 has 40 divisors (see below), whose sum is σ = 194405794176. Its totient is φ = 84945844368.

The previous prime is 128775579319. The next prime is 128775579341. The reversal of 128775579327 is 723975577821.

It is a happy number.

128775579327 is a `hidden beast` number, since 1 + 2 + 8 + 77 + 557 + 9 + 3 + 2 + 7 = 666.

It is not a de Polignac number, because 128775579327 - 2³ = 128775579319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128775579347) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2975598 + ... + 3018564.

Almost surely, 2^128775579327 is an apocalyptic number.

128775579327 is a deficient number, since it is larger than the sum of its proper divisors (65630214849).

128775579327 is a wasteful number, since it uses less digits than its factorization.

128775579327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43369 (or 43360 counting only the distinct ones).

The product of its digits is 51861600, while the sum is 63.

The spelling of 128775579327 in words is "one hundred twenty-eight billion, seven hundred seventy-five million, five hundred seventy-nine thousand, three hundred twenty-seven".