648760517 has 4 divisors (see below), whose sum is σ = 676967520. Its totient is φ = 620553516.

The previous prime is 648760513. The next prime is 648760523. The reversal of 648760517 is 715067846.

648760517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 648760517 - 2² = 648760513 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 (648760513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14103467 + ... + 14103512.

It is an arithmetic number, because the mean of its divisors is an integer number (169241880).

Almost surely, 2^648760517 is an apocalyptic number.

It is an amenable number.

648760517 is a deficient number, since it is larger than the sum of its proper divisors (28207003).

648760517 is a wasteful number, since it uses less digits than its factorization.

648760517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28207002.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 648760517 is about 25470.7777070116. Note that the first 4 decimals coincide. The cubic root of 648760517 is about 865.6881454229.

The spelling of 648760517 in words is "six hundred forty-eight million, seven hundred sixty thousand, five hundred seventeen".