646963206 has 16 divisors (see below), whose sum is σ = 1295497200. Its totient is φ = 215392608.

The previous prime is 646963193. The next prime is 646963253. The reversal of 646963206 is 602369646.

It is a super-2 number, since 2×646963206² = 837122779835596872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 60061 + ... + 70008.

It is an arithmetic number, because the mean of its divisors is an integer number (80968575).

Almost surely, 2^646963206 is an apocalyptic number.

646963206 is an abundant number, since it is smaller than the sum of its proper divisors (648533994).

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

646963206 is a wasteful number, since it uses less digits than its factorization.

646963206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130903.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 646963206 is about 25435.4714129697. The cubic root of 646963206 is about 864.8879786327.

The spelling of 646963206 in words is "six hundred forty-six million, nine hundred sixty-three thousand, two hundred six".