128335310687 has 8 divisors (see below), whose sum is σ = 132795360720. Its totient is φ = 123942329280.

The previous prime is 128335310683. The next prime is 128335310693. The reversal of 128335310687 is 786013533821.

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 128335310687 - 2² = 128335310683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128335310683) 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, 16763264 + ... + 16770917.

It is an arithmetic number, because the mean of its divisors is an integer number (16599420090).

Almost surely, 2^128335310687 is an apocalyptic number.

128335310687 is a deficient number, since it is larger than the sum of its proper divisors (4460050033).

128335310687 is an equidigital number, since it uses as much as digits as its factorization.

128335310687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33534313.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 128335310687 in words is "one hundred twenty-eight billion, three hundred thirty-five million, three hundred ten thousand, six hundred eighty-seven".