646106204 has 24 divisors (see below), whose sum is σ = 1138436208. Its totient is φ = 320846720.

The previous prime is 646106203. The next prime is 646106207. The reversal of 646106204 is 402601646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646106203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 546494 + ... + 547674.

It is an arithmetic number, because the mean of its divisors is an integer number (47434842).

Almost surely, 2^646106204 is an apocalyptic number.

It is an amenable number.

646106204 is a deficient number, since it is larger than the sum of its proper divisors (492330004).

646106204 is a wasteful number, since it uses less digits than its factorization.

646106204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005 (or 2003 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 646106204 is about 25418.6192386605. The cubic root of 646106204 is about 864.5059176210.

The spelling of 646106204 in words is "six hundred forty-six million, one hundred six thousand, two hundred four".