646606312 has 32 divisors (see below), whose sum is σ = 1334757600. Its totient is φ = 291211200.

The previous prime is 646606297. The next prime is 646606361. The reversal of 646606312 is 213606646.

646606312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24114 + ... + 43297.

It is an arithmetic number, because the mean of its divisors is an integer number (41711175).

Almost surely, 2^646606312 is an apocalyptic number.

It is an amenable number.

646606312 is an abundant number, since it is smaller than the sum of its proper divisors (688151288).

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

646606312 is a wasteful number, since it uses less digits than its factorization.

646606312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67537 (or 67533 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 646606312 is about 25428.4547701979. The cubic root of 646606312 is about 864.7289123446.

The spelling of 646606312 in words is "six hundred forty-six million, six hundred six thousand, three hundred twelve".