128038384907 has 4 divisors (see below), whose sum is σ = 128112784296. Its totient is φ = 127963985520.

The previous prime is 128038384889. The next prime is 128038384913. The reversal of 128038384907 is 709483830821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128038384907 - 2⁸ = 128038384651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128038384927) 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 3 ways as a sum of consecutive naturals, for example, 37197113 + ... + 37200554.

It is an arithmetic number, because the mean of its divisors is an integer number (32028196074).

Almost surely, 2^128038384907 is an apocalyptic number.

128038384907 is a deficient number, since it is larger than the sum of its proper divisors (74399389).

128038384907 is an equidigital number, since it uses as much as digits as its factorization.

128038384907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74399388.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 128038384907 in words is "one hundred twenty-eight billion, thirty-eight million, three hundred eighty-four thousand, nine hundred seven".