22788113561 has 4 divisors (see below), whose sum is σ = 22788653952. Its totient is φ = 22787573172.

The previous prime is 22788113533. The next prime is 22788113597. The reversal of 22788113561 is 16531188722.

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 a de Polignac number, because none of the positive numbers 2^k-22788113561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22788113501) 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, 201041 + ... + 293246.

It is an arithmetic number, because the mean of its divisors is an integer number (5697163488).

Almost surely, 2^22788113561 is an apocalyptic number.

It is an amenable number.

22788113561 is a deficient number, since it is larger than the sum of its proper divisors (540391).

22788113561 is an equidigital number, since it uses as much as digits as its factorization.

22788113561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540390.

The product of its digits is 161280, while the sum is 44.

The spelling of 22788113561 in words is "twenty-two billion, seven hundred eighty-eight million, one hundred thirteen thousand, five hundred sixty-one".