6563849988 has 12 divisors (see below), whose sum is σ = 15315650000. Its totient is φ = 2187949992.

The previous prime is 6563849927. The next prime is 6563850017. The reversal of 6563849988 is 8899483656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273493738 + ... + 273493761.

Almost surely, 2^6563849988 is an apocalyptic number.

It is an amenable number.

6563849988 is an abundant number, since it is smaller than the sum of its proper divisors (8751800012).

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

6563849988 is a wasteful number, since it uses less digits than its factorization.

6563849988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546987506 (or 546987504 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 66.

The square root of 6563849988 is about 81017.5906084598. The cubic root of 6563849988 is about 1872.3464675309.

The spelling of 6563849988 in words is "six billion, five hundred sixty-three million, eight hundred forty-nine thousand, nine hundred eighty-eight".