128523031303689 has 20 divisors (see below), whose sum is σ = 209444939903760. Its totient is φ = 77892746244120.

The previous prime is 128523031303673. The next prime is 128523031303729. The reversal of 128523031303689 is 986303130325821.

128523031303689 is a `hidden beast` number, since 1 + 2 + 8 + 523 + 0 + 3 + 1 + 3 + 0 + 36 + 89 = 666.

It is not a de Polignac number, because 128523031303689 - 2⁴ = 128523031303673 is a prime.

It is a super-2 number, since 2×128523031303689² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128523021303689) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 72122912299 + ... + 72122914080.

It is an arithmetic number, because the mean of its divisors is an integer number (10472246995188).

Almost surely, 2^{128523031303689} is an apocalyptic number.

It is an amenable number.

128523031303689 is a deficient number, since it is larger than the sum of its proper divisors (80921908600071).

128523031303689 is a wasteful number, since it uses less digits than its factorization.

128523031303689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144245826402 (or 144245826393 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 128523031303689 in words is "one hundred twenty-eight trillion, five hundred twenty-three billion, thirty-one million, three hundred three thousand, six hundred eighty-nine".