648385617 has 16 divisors (see below), whose sum is σ = 984112128. Its totient is φ = 375875280.

The previous prime is 648385597. The next prime is 648385649. The reversal of 648385617 is 716583846.

It is not a de Polignac number, because 648385617 - 2¹⁰ = 648384593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648385667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426373 + ... + 427890.

It is an arithmetic number, because the mean of its divisors is an integer number (61507008).

Almost surely, 2^648385617 is an apocalyptic number.

It is an amenable number.

648385617 is a deficient number, since it is larger than the sum of its proper divisors (335726511).

648385617 is a wasteful number, since it uses less digits than its factorization.

648385617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854300.

The product of its digits is 967680, while the sum is 48.

The square root of 648385617 is about 25463.4172294294. The cubic root of 648385617 is about 865.5213612179.

The spelling of 648385617 in words is "six hundred forty-eight million, three hundred eighty-five thousand, six hundred seventeen".