646083812 has 24 divisors (see below), whose sum is σ = 1250811072. Its totient is φ = 289536800.

The previous prime is 646083797. The next prime is 646083859. The reversal of 646083812 is 218380646.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100283 + ... + 106530.

It is an arithmetic number, because the mean of its divisors is an integer number (52117128).

Almost surely, 2^646083812 is an apocalyptic number.

It is an amenable number.

646083812 is a deficient number, since it is larger than the sum of its proper divisors (604727260).

646083812 is a wasteful number, since it uses less digits than its factorization.

646083812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206899 (or 206897 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 646083812 is about 25418.1787703211. The cubic root of 646083812 is about 864.4959304909.

The spelling of 646083812 in words is "six hundred forty-six million, eighty-three thousand, eight hundred twelve".