128505544756 has 24 divisors (see below), whose sum is σ = 236814992960. Its totient is φ = 60846811200.

The previous prime is 128505544729. The next prime is 128505544771. The reversal of 128505544756 is 657445505821.

128505544756 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143760 + ... + 526951.

Almost surely, 2^128505544756 is an apocalyptic number.

It is an amenable number.

128505544756 is a deficient number, since it is larger than the sum of its proper divisors (108309448204).

128505544756 is a wasteful number, since it uses less digits than its factorization.

128505544756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673255 (or 673253 counting only the distinct ones).

The product of its (nonzero) digits is 6720000, while the sum is 52.

The spelling of 128505544756 in words is "one hundred twenty-eight billion, five hundred five million, five hundred forty-four thousand, seven hundred fifty-six".