649648016 has 10 divisors (see below), whose sum is σ = 1258693062. Its totient is φ = 324824000.

The previous prime is 649648009. The next prime is 649648033. The reversal of 649648016 is 610846946.

649648016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 545689600 + 103958416 = 23360^2 + 10196^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20301485 + ... + 20301516.

Almost surely, 2^649648016 is an apocalyptic number.

It is an amenable number.

649648016 is a deficient number, since it is larger than the sum of its proper divisors (609045046).

649648016 is a wasteful number, since it uses less digits than its factorization.

649648016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40603009 (or 40603003 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 649648016 is about 25488.1936590257. The cubic root of 649648016 is about 866.0827169521.

The spelling of 649648016 in words is "six hundred forty-nine million, six hundred forty-eight thousand, sixteen".