6561207000223 has 4 divisors (see below), whose sum is σ = 6561320599240. Its totient is φ = 6561093401208.

The previous prime is 6561207000209. The next prime is 6561207000263. The reversal of 6561207000223 is 3220007021656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6561207000223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561207000203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56712828 + ... + 56828401.

It is an arithmetic number, because the mean of its divisors is an integer number (1640330149810).

Almost surely, 2^{6561207000223} is an apocalyptic number.

6561207000223 is a deficient number, since it is larger than the sum of its proper divisors (113599017).

6561207000223 is a wasteful number, since it uses less digits than its factorization.

6561207000223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113599016.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 6561207000223 in words is "six trillion, five hundred sixty-one billion, two hundred seven million, two hundred twenty-three", and thus it is an aban number.