648805351417 has 2 divisors, whose sum is σ = 648805351418. Its totient is φ = 648805351416.

The previous prime is 648805351399. The next prime is 648805351459. The reversal of 648805351417 is 714153508846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 582686428921 + 66118922496 = 763339^2 + 257136^2 .

It is a cyclic number.

It is not a de Polignac number, because 648805351417 - 2¹⁵ = 648805318649 is a prime.

It is not a weakly prime, because it can be changed into another prime (648805351477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324402675708 + 324402675709.

It is an arithmetic number, because the mean of its divisors is an integer number (324402675709).

Almost surely, 2^648805351417 is an apocalyptic number.

It is an amenable number.

648805351417 is a deficient number, since it is larger than the sum of its proper divisors (1).

648805351417 is an equidigital number, since it uses as much as digits as its factorization.

648805351417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 648805351417 in words is "six hundred forty-eight billion, eight hundred five million, three hundred fifty-one thousand, four hundred seventeen".