648349765 has 16 divisors (see below), whose sum is σ = 892021248. Its totient is φ = 443154816.

The previous prime is 648349759. The next prime is 648349789. The reversal of 648349765 is 567943846.

It is a cyclic number.

It is not a de Polignac number, because 648349765 - 2⁵ = 648349733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18637 + ... + 40546.

It is an arithmetic number, because the mean of its divisors is an integer number (55751328).

Almost surely, 2^648349765 is an apocalyptic number.

It is an amenable number.

648349765 is a deficient number, since it is larger than the sum of its proper divisors (243671483).

648349765 is a wasteful number, since it uses less digits than its factorization.

648349765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59508.

The product of its digits is 4354560, while the sum is 52.

The square root of 648349765 is about 25462.7132293477. The cubic root of 648349765 is about 865.5054081374.

The spelling of 648349765 in words is "six hundred forty-eight million, three hundred forty-nine thousand, seven hundred sixty-five".