22811556809 has 4 divisors (see below), whose sum is σ = 22813882320. Its totient is φ = 22809231300.

The previous prime is 22811556661. The next prime is 22811556821. The reversal of 22811556809 is 90865511822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22811556809 - 2³² = 18516589513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22811556839) 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, 1147979 + ... + 1167680.

It is an arithmetic number, because the mean of its divisors is an integer number (5703470580).

Almost surely, 2^22811556809 is an apocalyptic number.

It is an amenable number.

22811556809 is a deficient number, since it is larger than the sum of its proper divisors (2325511).

22811556809 is an equidigital number, since it uses as much as digits as its factorization.

22811556809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325510.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 22811556809 in words is "twenty-two billion, eight hundred eleven million, five hundred fifty-six thousand, eight hundred nine".