128442795817 has 8 divisors (see below), whose sum is σ = 146799487296. Its totient is φ = 110088034512.

The previous prime is 128442795799. The next prime is 128442795829. The reversal of 128442795817 is 718597244821.

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 128442795817 - 2¹⁵ = 128442763049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128442795857) 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, 337018 + ... + 608659.

It is an arithmetic number, because the mean of its divisors is an integer number (18349935912).

Almost surely, 2^128442795817 is an apocalyptic number.

It is an amenable number.

128442795817 is a deficient number, since it is larger than the sum of its proper divisors (18356691479).

128442795817 is an equidigital number, since it uses as much as digits as its factorization.

128442795817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965087.

The product of its digits is 9031680, while the sum is 58.

The spelling of 128442795817 in words is "one hundred twenty-eight billion, four hundred forty-two million, seven hundred ninety-five thousand, eight hundred seventeen".