648911664 has 30 divisors (see below), whose sum is σ = 1816051796. Its totient is φ = 216303840.

The previous prime is 648911651. The next prime is 648911689. The reversal of 648911664 is 466119846.

648911664 is a `hidden beast` number, since 6 + 489 + 1 + 166 + 4 = 666.

648911664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2253022 + ... + 2253309.

Almost surely, 2^648911664 is an apocalyptic number.

It is an amenable number.

648911664 is an abundant number, since it is smaller than the sum of its proper divisors (1167140132).

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

648911664 is a wasteful number, since it uses less digits than its factorization.

648911664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506345 (or 4506336 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 648911664 is about 25473.7446010593. The cubic root of 648911664 is about 865.7553689990.

The spelling of 648911664 in words is "six hundred forty-eight million, nine hundred eleven thousand, six hundred sixty-four".