646441364 has 12 divisors (see below), whose sum is σ = 1132003488. Its totient is φ = 323011800.

The previous prime is 646441363. The next prime is 646441379. The reversal of 646441364 is 463144646.

646441364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646441361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45152 + ... + 57719.

It is an arithmetic number, because the mean of its divisors is an integer number (94333624).

Almost surely, 2^646441364 is an apocalyptic number.

It is an amenable number.

646441364 is a deficient number, since it is larger than the sum of its proper divisors (485562124).

646441364 is a wasteful number, since it uses less digits than its factorization.

646441364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104446 (or 104444 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 646441364 is about 25425.2111888967. The cubic root of 646441364 is about 864.6553758757.

The spelling of 646441364 in words is "six hundred forty-six million, four hundred forty-one thousand, three hundred sixty-four".