128917342507 has 8 divisors (see below), whose sum is σ = 134871492672. Its totient is φ = 123096993600.

The previous prime is 128917342501. The next prime is 128917342511. The reversal of 128917342507 is 705243719821.

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 128917342507 - 2³⁵ = 94557604139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128917342501) 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, 33448344 + ... + 33452197.

It is an arithmetic number, because the mean of its divisors is an integer number (16858936584).

Almost surely, 2^128917342507 is an apocalyptic number.

128917342507 is a deficient number, since it is larger than the sum of its proper divisors (5954150165).

128917342507 is an equidigital number, since it uses as much as digits as its factorization.

128917342507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66900629.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 128917342507 in words is "one hundred twenty-eight billion, nine hundred seventeen million, three hundred forty-two thousand, five hundred seven".