646699368 has 32 divisors (see below), whose sum is σ = 1847712960. Its totient is φ = 184771200.

The previous prime is 646699351. The next prime is 646699387. The reversal of 646699368 is 863996646.

646699368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1924533 + ... + 1924868.

It is an arithmetic number, because the mean of its divisors is an integer number (57741030).

Almost surely, 2^646699368 is an apocalyptic number.

It is an amenable number.

646699368 is an abundant number, since it is smaller than the sum of its proper divisors (1201013592).

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

646699368 is a wasteful number, since it uses less digits than its factorization.

646699368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849417 (or 3849413 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 57.

The square root of 646699368 is about 25430.2844655737. The cubic root of 646699368 is about 864.7703926871.

The spelling of 646699368 in words is "six hundred forty-six million, six hundred ninety-nine thousand, three hundred sixty-eight".