643046496 has 48 divisors (see below), whose sum is σ = 1691097408. Its totient is φ = 213955200.

The previous prime is 643046447. The next prime is 643046513. The reversal of 643046496 is 694640346.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48951 + ... + 60681.

It is an arithmetic number, because the mean of its divisors is an integer number (35231196).

Almost surely, 2^643046496 is an apocalyptic number.

It is an amenable number.

643046496 is an abundant number, since it is smaller than the sum of its proper divisors (1048050912).

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

643046496 is a wasteful number, since it uses less digits than its factorization.

643046496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12315 (or 12307 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 643046496 is about 25358.3614612616. The cubic root of 643046496 is about 863.1391030423.

The spelling of 643046496 in words is "six hundred forty-three million, forty-six thousand, four hundred ninety-six".