648894864 has 40 divisors (see below), whose sum is σ = 1717202592. Its totient is φ = 211022080.

The previous prime is 648894833. The next prime is 648894877. The reversal of 648894864 is 468498846.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162894 + ... + 166829.

Almost surely, 2^648894864 is an apocalyptic number.

It is an amenable number.

648894864 is an abundant number, since it is smaller than the sum of its proper divisors (1068307728).

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

648894864 is a wasteful number, since it uses less digits than its factorization.

648894864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329775 (or 329769 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 57.

The square root of 648894864 is about 25473.4148476407. The cubic root of 648894864 is about 865.7478976093.

The spelling of 648894864 in words is "six hundred forty-eight million, eight hundred ninety-four thousand, eight hundred sixty-four".