128304105917 has 48 divisors (see below), whose sum is σ = 145376078400. Its totient is φ = 113084075520.

The previous prime is 128304105913. The next prime is 128304105929. The reversal of 128304105917 is 719501403821.

It is not a de Polignac number, because 128304105917 - 2² = 128304105913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128304105913) 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 47 ways as a sum of consecutive naturals, for example, 115692959 + ... + 115694067.

It is an arithmetic number, because the mean of its divisors is an integer number (3028668300).

Almost surely, 2^128304105917 is an apocalyptic number.

It is an amenable number.

128304105917 is a deficient number, since it is larger than the sum of its proper divisors (17071972483).

128304105917 is a wasteful number, since it uses less digits than its factorization.

128304105917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1505 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 128304105917 in words is "one hundred twenty-eight billion, three hundred four million, one hundred five thousand, nine hundred seventeen".