649956064 has 24 divisors (see below), whose sum is σ = 1286243280. Its totient is φ = 323291136.

The previous prime is 649956049. The next prime is 649956113. The reversal of 649956064 is 460659946.

649956064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 649955999 and 649956017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46444 + ... + 58795.

It is an arithmetic number, because the mean of its divisors is an integer number (53593470).

Almost surely, 2^649956064 is an apocalyptic number.

It is an amenable number.

649956064 is a deficient number, since it is larger than the sum of its proper divisors (636287216).

649956064 is a wasteful number, since it uses less digits than its factorization.

649956064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105442 (or 105434 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 649956064 is about 25494.2358975514. The cubic root of 649956064 is about 866.2195874235.

The spelling of 649956064 in words is "six hundred forty-nine million, nine hundred fifty-six thousand, sixty-four".