648568464 has 20 divisors (see below), whose sum is σ = 1675468656. Its totient is φ = 216189472.

The previous prime is 648568451. The next prime is 648568471. The reversal of 648568464 is 464865846.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6755874 + ... + 6755969.

Almost surely, 2^648568464 is an apocalyptic number.

It is an amenable number.

648568464 is an abundant number, since it is smaller than the sum of its proper divisors (1026900192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648568464 is a wasteful number, since it uses less digits than its factorization.

648568464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13511854 (or 13511848 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 51.

The square root of 648568464 is about 25467.0073624680. The cubic root of 648568464 is about 865.6027135830.

The spelling of 648568464 in words is "six hundred forty-eight million, five hundred sixty-eight thousand, four hundred sixty-four".