646612968 has 32 divisors (see below), whose sum is σ = 1655962560. Its totient is φ = 210280320.

The previous prime is 646612957. The next prime is 646612991. The reversal of 646612968 is 869216646.

It is a happy number.

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, 327580 + ... + 329547.

It is an arithmetic number, because the mean of its divisors is an integer number (51748830).

Almost surely, 2^646612968 is an apocalyptic number.

It is an amenable number.

646612968 is an abundant number, since it is smaller than the sum of its proper divisors (1009349592).

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

646612968 is a wasteful number, since it uses less digits than its factorization.

646612968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657177 (or 657173 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 646612968 is about 25428.5856468660. The cubic root of 646612968 is about 864.7318794339.

The spelling of 646612968 in words is "six hundred forty-six million, six hundred twelve thousand, nine hundred sixty-eight".