646303616 has 32 divisors (see below), whose sum is σ = 1471496880. Its totient is φ = 276986880.

The previous prime is 646303597. The next prime is 646303633. The reversal of 646303616 is 616303646.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 359765 + ... + 361556.

Almost surely, 2^646303616 is an apocalyptic number.

It is an amenable number.

646303616 is an abundant number, since it is smaller than the sum of its proper divisors (825193264).

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

646303616 is an equidigital number, since it uses as much as digits as its factorization.

646303616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721342 (or 721330 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 646303616 is about 25422.5021585209. The cubic root of 646303616 is about 864.5939560181.

The spelling of 646303616 in words is "six hundred forty-six million, three hundred three thousand, six hundred sixteen".