646346318 has 4 divisors (see below), whose sum is σ = 969519480. Its totient is φ = 323173158.

The previous prime is 646346293. The next prime is 646346353. The reversal of 646346318 is 813643646.

646346318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161586578 + ... + 161586581.

It is an arithmetic number, because the mean of its divisors is an integer number (242379870).

Almost surely, 2^646346318 is an apocalyptic number.

646346318 is a deficient number, since it is larger than the sum of its proper divisors (323173162).

646346318 is a wasteful number, since it uses less digits than its factorization.

646346318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323173161.

The product of its digits is 248832, while the sum is 41.

The square root of 646346318 is about 25423.3419911702. The cubic root of 646346318 is about 864.6129971607.

The spelling of 646346318 in words is "six hundred forty-six million, three hundred forty-six thousand, three hundred eighteen".