6563329820 has 24 divisors (see below), whose sum is σ = 13785163728. Its totient is φ = 2624918400.

The previous prime is 6563329807. The next prime is 6563329853. The reversal of 6563329820 is 289233656.

It is a super-2 number, since 2×6563329820² = 86154596652202464800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126080 + ... + 170360.

It is an arithmetic number, because the mean of its divisors is an integer number (574381822).

Almost surely, 2^6563329820 is an apocalyptic number.

It is an amenable number.

6563329820 is an abundant number, since it is smaller than the sum of its proper divisors (7221833908).

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

6563329820 is a wasteful number, since it uses less digits than its factorization.

6563329820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51701 (or 51699 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 6563329820 is about 81014.3803284331. The cubic root of 6563329820 is about 1872.2970066988.

The spelling of 6563329820 in words is "six billion, five hundred sixty-three million, three hundred twenty-nine thousand, eight hundred twenty".