22581786661 has 12 divisors (see below), whose sum is σ = 27115985280. Its totient is φ = 18731434680.

The previous prime is 22581786649. The next prime is 22581786697. The reversal of 22581786661 is 16668718522.

It is a happy number.

It is not a de Polignac number, because 22581786661 - 2⁵ = 22581786629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22581786599 and 22581786608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22581786611) 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 11 ways as a sum of consecutive naturals, for example, 7431591 + ... + 7434628.

It is an arithmetic number, because the mean of its divisors is an integer number (2259665440).

Almost surely, 2^22581786661 is an apocalyptic number.

It is an amenable number.

22581786661 is a deficient number, since it is larger than the sum of its proper divisors (4534198619).

22581786661 is a wasteful number, since it uses less digits than its factorization.

22581786661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14866264 (or 14866257 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The spelling of 22581786661 in words is "twenty-two billion, five hundred eighty-one million, seven hundred eighty-six thousand, six hundred sixty-one".