648278016 has 52 divisors (see below), whose sum is σ = 1728563112. Its totient is φ = 216088576.

The previous prime is 648278009. The next prime is 648278021. The reversal of 648278016 is 610872846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14091 + ... + 38666.

Almost surely, 2^648278016 is an apocalyptic number.

It is an amenable number.

648278016 is an abundant number, since it is smaller than the sum of its proper divisors (1080285096).

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

648278016 is an equidigital number, since it uses as much as digits as its factorization.

648278016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52784 (or 52762 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 648278016 is about 25461.3042870942. The cubic root of 648278016 is about 865.4734801865.

The spelling of 648278016 in words is "six hundred forty-eight million, two hundred seventy-eight thousand, sixteen".