648134817 has 8 divisors (see below), whose sum is σ = 942741600. Its totient is φ = 392808960.

The previous prime is 648134801. The next prime is 648134863. The reversal of 648134817 is 718431846.

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

It is not a de Polignac number, because 648134817 - 2⁴ = 648134801 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (648134867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9820192 + ... + 9820257.

It is an arithmetic number, because the mean of its divisors is an integer number (117842700).

Almost surely, 2^648134817 is an apocalyptic number.

It is an amenable number.

648134817 is a deficient number, since it is larger than the sum of its proper divisors (294606783).

648134817 is a wasteful number, since it uses less digits than its factorization.

648134817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640463.

The product of its digits is 129024, while the sum is 42.

The square root of 648134817 is about 25458.4920409674. The cubic root of 648134817 is about 865.4097502948.

The spelling of 648134817 in words is "six hundred forty-eight million, one hundred thirty-four thousand, eight hundred seventeen".