128785069907 has 8 divisors (see below), whose sum is σ = 138694539984. Its totient is φ = 118876017888.

The previous prime is 128785069877. The next prime is 128785069909. The reversal of 128785069907 is 709960587821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128785069907 - 2²² = 128780875603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128785069907.

It is not an unprimeable number, because it can be changed into a prime (128785069909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876173 + ... + 1012545.

It is an arithmetic number, because the mean of its divisors is an integer number (17336817498).

Almost surely, 2^128785069907 is an apocalyptic number.

128785069907 is a deficient number, since it is larger than the sum of its proper divisors (9909470077).

128785069907 is a wasteful number, since it uses less digits than its factorization.

128785069907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209029.

The product of its (nonzero) digits is 15240960, while the sum is 62.

The spelling of 128785069907 in words is "one hundred twenty-eight billion, seven hundred eighty-five million, sixty-nine thousand, nine hundred seven".