128708099523 has 96 divisors (see below), whose sum is σ = 198585983232. Its totient is φ = 83280960000.

The previous prime is 128708099479. The next prime is 128708099539. The reversal of 128708099523 is 325990807821.

128708099523 is a `hidden beast` number, since 1 + 28 + 7 + 0 + 8 + 0 + 99 + 523 = 666.

It is not a de Polignac number, because 128708099523 - 2⁶ = 128708099459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128708099523.

It is not an unprimeable number, because it can be changed into a prime (128708099563) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 512781148 + ... + 512781398.

It is an arithmetic number, because the mean of its divisors is an integer number (2068603992).

Almost surely, 2^128708099523 is an apocalyptic number.

128708099523 is a deficient number, since it is larger than the sum of its proper divisors (69877883709).

128708099523 is a wasteful number, since it uses less digits than its factorization.

128708099523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 128708099523 in words is "one hundred twenty-eight billion, seven hundred eight million, ninety-nine thousand, five hundred twenty-three".