19128517417 has 8 divisors (see below), whose sum is σ = 19155112200. Its totient is φ = 19101944064.

The previous prime is 19128517411. The next prime is 19128517489. The reversal of 19128517417 is 71471582191.

It can be written as a sum of positive squares in 4 ways, for example, as 2098006416 + 17030511001 = 45804^2 + 130501^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19128517417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19128517411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2540943 + ... + 2548459.

It is an arithmetic number, because the mean of its divisors is an integer number (2394389025).

Almost surely, 2^19128517417 is an apocalyptic number.

It is an amenable number.

19128517417 is a deficient number, since it is larger than the sum of its proper divisors (26594783).

19128517417 is a wasteful number, since it uses less digits than its factorization.

19128517417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715.

The product of its digits is 141120, while the sum is 46.

The spelling of 19128517417 in words is "nineteen billion, one hundred twenty-eight million, five hundred seventeen thousand, four hundred seventeen".