128568385172 has 24 divisors (see below), whose sum is σ = 225597536640. Its totient is φ = 64112037440.

The previous prime is 128568385171. The next prime is 128568385189. The reversal of 128568385172 is 271583865821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128568385171) 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 7 ways as a sum of consecutive naturals, for example, 7058597 + ... + 7076787.

It is an arithmetic number, because the mean of its divisors is an integer number (9399897360).

Almost surely, 2^128568385172 is an apocalyptic number.

It is an amenable number.

128568385172 is a deficient number, since it is larger than the sum of its proper divisors (97029151468).

128568385172 is a wasteful number, since it uses less digits than its factorization.

128568385172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22831 (or 22829 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 56.

The spelling of 128568385172 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, three hundred eighty-five thousand, one hundred seventy-two".