6563689920 has 168 divisors, whose sum is σ = 22630296624. Its totient is φ = 1746137088.

The previous prime is 6563689871. The next prime is 6563689921. The reversal of 6563689920 is 299863656.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6563689921) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1313667 + ... + 1318653.

Almost surely, 2^6563689920 is an apocalyptic number.

6563689920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6563689920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11315148312).

6563689920 is an abundant number, since it is smaller than the sum of its proper divisors (16066606704).

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

6563689920 is a wasteful number, since it uses less digits than its factorization.

6563689920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467 (or 5454 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The square root of 6563689920 is about 81016.6027428946. The cubic root of 6563689920 is about 1872.3312475410.

The spelling of 6563689920 in words is "six billion, five hundred sixty-three million, six hundred eighty-nine thousand, nine hundred twenty".