5128865667217 has 8 divisors (see below), whose sum is σ = 5218589383200. Its totient is φ = 5039235077664.

The previous prime is 5128865667131. The next prime is 5128865667221. The reversal of 5128865667217 is 7127665688215.

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-5128865667217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5128865667517) 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, 23170492 + ... + 23390797.

It is an arithmetic number, because the mean of its divisors is an integer number (652323672900).

Almost surely, 2^{5128865667217} is an apocalyptic number.

It is an amenable number.

5128865667217 is a deficient number, since it is larger than the sum of its proper divisors (89723715983).

5128865667217 is a wasteful number, since it uses less digits than its factorization.

5128865667217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46563215.

The product of its digits is 67737600, while the sum is 64.

The spelling of 5128865667217 in words is "five trillion, one hundred twenty-eight billion, eight hundred sixty-five million, six hundred sixty-seven thousand, two hundred seventeen".