648045762717 has 4 divisors (see below), whose sum is σ = 864061016960. Its totient is φ = 432030508476.

The previous prime is 648045762709. The next prime is 648045762731. The reversal of 648045762717 is 717267540846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 648045762717 - 2³ = 648045762709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648045762757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108007627117 + ... + 108007627122.

It is an arithmetic number, because the mean of its divisors is an integer number (216015254240).

Almost surely, 2^648045762717 is an apocalyptic number.

It is an amenable number.

648045762717 is a deficient number, since it is larger than the sum of its proper divisors (216015254243).

648045762717 is a wasteful number, since it uses less digits than its factorization.

648045762717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216015254242.

The product of its (nonzero) digits is 15805440, while the sum is 57.

The spelling of 648045762717 in words is "six hundred forty-eight billion, forty-five million, seven hundred sixty-two thousand, seven hundred seventeen".