128429765187 has 8 divisors (see below), whose sum is σ = 171250431504. Its totient is φ = 85614471168.

The previous prime is 128429765183. The next prime is 128429765209. The reversal of 128429765187 is 781567924821.

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

It is not a de Polignac number, because 128429765187 - 2² = 128429765183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128429765187.

It is not an unprimeable number, because it can be changed into a prime (128429765183) 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, 1286958 + ... + 1383155.

It is an arithmetic number, because the mean of its divisors is an integer number (21406303938).

Almost surely, 2^128429765187 is an apocalyptic number.

128429765187 is a deficient number, since it is larger than the sum of its proper divisors (42820666317).

128429765187 is a wasteful number, since it uses less digits than its factorization.

128429765187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686149.

The product of its digits is 13547520, while the sum is 60.

The spelling of 128429765187 in words is "one hundred twenty-eight billion, four hundred twenty-nine million, seven hundred sixty-five thousand, one hundred eighty-seven".