649945684 has 12 divisors (see below), whose sum is σ = 1186857504. Its totient is φ = 310843544.

The previous prime is 649945679. The next prime is 649945691. The reversal of 649945684 is 486549946.

649945684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3532222 + ... + 3532405.

It is an arithmetic number, because the mean of its divisors is an integer number (98904792).

Almost surely, 2^649945684 is an apocalyptic number.

It is an amenable number.

649945684 is a deficient number, since it is larger than the sum of its proper divisors (536911820).

649945684 is a wasteful number, since it uses less digits than its factorization.

649945684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064654 (or 7064652 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 55.

The square root of 649945684 is about 25494.0323213100. The cubic root of 649945684 is about 866.2149761338.

The spelling of 649945684 in words is "six hundred forty-nine million, nine hundred forty-five thousand, six hundred eighty-four".