646356344 has 8 divisors (see below), whose sum is σ = 1211918160. Its totient is φ = 323178168.

The previous prime is 646356331. The next prime is 646356353. The reversal of 646356344 is 443653646.

646356344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40397264 + ... + 40397279.

It is an arithmetic number, because the mean of its divisors is an integer number (151489770).

Almost surely, 2^646356344 is an apocalyptic number.

It is an amenable number.

646356344 is a deficient number, since it is larger than the sum of its proper divisors (565561816).

646356344 is a wasteful number, since it uses less digits than its factorization.

646356344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80794549 (or 80794545 counting only the distinct ones).

The product of its digits is 622080, while the sum is 41.

The square root of 646356344 is about 25423.5391714057. The cubic root of 646356344 is about 864.6174677079.

The spelling of 646356344 in words is "six hundred forty-six million, three hundred fifty-six thousand, three hundred forty-four".