6563216661803 has 8 divisors (see below), whose sum is σ = 6682172910336. Its totient is φ = 6444996985000.

The previous prime is 6563216661791. The next prime is 6563216661823. The reversal of 6563216661803 is 3081666123656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6563216661803 - 2²² = 6563212467499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6563216661823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184124951 + ... + 184160592.

It is an arithmetic number, because the mean of its divisors is an integer number (835271613792).

Almost surely, 2^{6563216661803} is an apocalyptic number.

6563216661803 is a deficient number, since it is larger than the sum of its proper divisors (118956248533).

6563216661803 is a wasteful number, since it uses less digits than its factorization.

6563216661803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368285865.

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 6563216661803 in words is "six trillion, five hundred sixty-three billion, two hundred sixteen million, six hundred sixty-one thousand, eight hundred three".