646892196 has 12 divisors (see below), whose sum is σ = 1509415152. Its totient is φ = 215630728.

The previous prime is 646892149. The next prime is 646892203. The reversal of 646892196 is 691298646.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26953830 + ... + 26953853.

It is an arithmetic number, because the mean of its divisors is an integer number (125784596).

Almost surely, 2^646892196 is an apocalyptic number.

It is an amenable number.

646892196 is an abundant number, since it is smaller than the sum of its proper divisors (862522956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646892196 is a wasteful number, since it uses less digits than its factorization.

646892196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53907690 (or 53907688 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 646892196 is about 25434.0754893902. The cubic root of 646892196 is about 864.8563344104.

The spelling of 646892196 in words is "six hundred forty-six million, eight hundred ninety-two thousand, one hundred ninety-six".