128928425324309 has 8 divisors (see below), whose sum is σ = 147013408062360. Its totient is φ = 112010215666176.

The previous prime is 128928425324299. The next prime is 128928425324327. The reversal of 128928425324309 is 903423524829821.

It can be written as a sum of positive squares in 4 ways, for example, as 200566935409 + 128727858388900 = 447847^2 + 11345830^2 .

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 128928425324309 - 2⁸ = 128928425324053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128928425324359) 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, 291693269744 + ... + 291693270185.

It is an arithmetic number, because the mean of its divisors is an integer number (18376676007795).

Almost surely, 2^{128928425324309} is an apocalyptic number.

It is an amenable number.

128928425324309 is a deficient number, since it is larger than the sum of its proper divisors (18084982738051).

128928425324309 is a wasteful number, since it uses less digits than its factorization.

128928425324309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583386539959.

The product of its (nonzero) digits is 59719680, while the sum is 62.

The spelling of 128928425324309 in words is "one hundred twenty-eight trillion, nine hundred twenty-eight billion, four hundred twenty-five million, three hundred twenty-four thousand, three hundred nine".