22091768689 has 3 divisors (see below), whose sum is σ = 22091917323. Its totient is φ = 22091620056.

The previous prime is 22091768681. The next prime is 22091768767. The reversal of 22091768689 is 98686719022.

The square root of 22091768689 is 148633.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 8498074225 + 13593694464 = 92185^2 + 116592^2 .

It is not a de Polignac number, because 22091768689 - 2³ = 22091768681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22091768681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 74317 + ... + 222949.

It is an arithmetic number, because the mean of its divisors is an integer number (7363972441).

Almost surely, 2^22091768689 is an apocalyptic number.

22091768689 is the 148633-rd square number.

22091768689 is the 74317-th centered octagonal number.

It is an amenable number.

22091768689 is a deficient number, since it is larger than the sum of its proper divisors (148634).

22091768689 is an frugal number, since it uses more digits than its factorization.

22091768689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297266 (or 148633 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 22091768689 in words is "twenty-two billion, ninety-one million, seven hundred sixty-eight thousand, six hundred eighty-nine".