648617589 has 12 divisors (see below), whose sum is σ = 950088672. Its totient is φ = 426321000.

The previous prime is 648617579. The next prime is 648617597. The reversal of 648617589 is 985716846.

648617589 is a `hidden beast` number, since 6 + 48 + 6 + 17 + 589 = 666.

It is not a de Polignac number, because 648617589 - 2⁹ = 648617077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648617579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 506887 + ... + 508164.

It is an arithmetic number, because the mean of its divisors is an integer number (79174056).

Almost surely, 2^648617589 is an apocalyptic number.

It is an amenable number.

648617589 is a deficient number, since it is larger than the sum of its proper divisors (301471083).

648617589 is a wasteful number, since it uses less digits than its factorization.

648617589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015128 (or 1015125 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 648617589 is about 25467.9718273757. The cubic root of 648617589 is about 865.6245676930.

The spelling of 648617589 in words is "six hundred forty-eight million, six hundred seventeen thousand, five hundred eighty-nine".