128288044539 has 20 divisors (see below), whose sum is σ = 196819633824. Its totient is φ = 83213864784.

The previous prime is 128288044513. The next prime is 128288044597. The reversal of 128288044539 is 935440882821.

128288044539 is a `hidden beast` number, since 1 + 2 + 8 + 28 + 80 + 4 + 4 + 539 = 666.

It is not a de Polignac number, because 128288044539 - 2⁷ = 128288044411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128288044439) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 21399747 + ... + 21405740.

Almost surely, 2^128288044539 is an apocalyptic number.

128288044539 is a deficient number, since it is larger than the sum of its proper divisors (68531589285).

128288044539 is an equidigital number, since it uses as much as digits as its factorization.

128288044539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42805536 (or 42805527 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 128288044539 in words is "one hundred twenty-eight billion, two hundred eighty-eight million, forty-four thousand, five hundred thirty-nine".