646544104 has 32 divisors (see below), whose sum is σ = 1245273120. Its totient is φ = 314588736.

The previous prime is 646544089. The next prime is 646544111. The reversal of 646544104 is 401445646.

646544104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 646544104.

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, 37222 + ... + 51754.

It is an arithmetic number, because the mean of its divisors is an integer number (38914785).

Almost surely, 2^646544104 is an apocalyptic number.

It is an amenable number.

646544104 is a deficient number, since it is larger than the sum of its proper divisors (598729016).

646544104 is a wasteful number, since it uses less digits than its factorization.

646544104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14689 (or 14685 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 646544104 is about 25427.2315441536. The cubic root of 646544104 is about 864.7011804876.

The spelling of 646544104 in words is "six hundred forty-six million, five hundred forty-four thousand, one hundred four".