646363912 has 8 divisors (see below), whose sum is σ = 1211932350. Its totient is φ = 323181952.

The previous prime is 646363903. The next prime is 646363933. The reversal of 646363912 is 219363646.

It can be written as a sum of positive squares in only one way, i.e., 642419716 + 3944196 = 25346^2 + 1986^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 40397737 + ... + 40397752.

Almost surely, 2^646363912 is an apocalyptic number.

It is an amenable number.

646363912 is a deficient number, since it is larger than the sum of its proper divisors (565568438).

646363912 is a wasteful number, since it uses less digits than its factorization.

646363912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80795495 (or 80795491 counting only the distinct ones).

The product of its digits is 139968, while the sum is 40.

The square root of 646363912 is about 25423.6880094136. The cubic root of 646363912 is about 864.6208422135.

The spelling of 646363912 in words is "six hundred forty-six million, three hundred sixty-three thousand, nine hundred twelve".