646959036 has 24 divisors (see below), whose sum is σ = 1523423440. Its totient is φ = 213674112.

The previous prime is 646959007. The next prime is 646959059. The reversal of 646959036 is 630959646.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246001 + ... + 248616.

Almost surely, 2^646959036 is an apocalyptic number.

It is an amenable number.

646959036 is an abundant number, since it is smaller than the sum of its proper divisors (876464404).

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

646959036 is a wasteful number, since it uses less digits than its factorization.

646959036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494733 (or 494731 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 646959036 is about 25435.3894406986. The cubic root of 646959036 is about 864.8861204175.

The spelling of 646959036 in words is "six hundred forty-six million, nine hundred fifty-nine thousand, thirty-six".