128409633897 has 8 divisors (see below), whose sum is σ = 171243165600. Its totient is φ = 85591262400.

The previous prime is 128409633889. The next prime is 128409633899. The reversal of 128409633897 is 798336904821.

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

It is not a de Polignac number, because 128409633897 - 2³ = 128409633889 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 128409633897.

It is not an unprimeable number, because it can be changed into a prime (128409633899) 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, 3770272 + ... + 3804177.

It is an arithmetic number, because the mean of its divisors is an integer number (21405395700).

Almost surely, 2^128409633897 is an apocalyptic number.

It is an amenable number.

128409633897 is a deficient number, since it is larger than the sum of its proper divisors (42833531703).

128409633897 is an equidigital number, since it uses as much as digits as its factorization.

128409633897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7580103.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 128409633897 in words is "one hundred twenty-eight billion, four hundred nine million, six hundred thirty-three thousand, eight hundred ninety-seven".