646404014 has 8 divisors (see below), whose sum is σ = 969756528. Its totient is φ = 323151840.

The previous prime is 646403999. The next prime is 646404049. The reversal of 646404014 is 410404646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6107 + ... + 36470.

It is an arithmetic number, because the mean of its divisors is an integer number (121219566).

Almost surely, 2^646404014 is an apocalyptic number.

646404014 is a deficient number, since it is larger than the sum of its proper divisors (323352514).

646404014 is a wasteful number, since it uses less digits than its factorization.

646404014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50170.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 646404014 is about 25424.4766711136. The cubic root of 646404014 is about 864.6387229086.

The spelling of 646404014 in words is "six hundred forty-six million, four hundred four thousand, fourteen".