22981840961 has 2 divisors, whose sum is σ = 22981840962. Its totient is φ = 22981840960.

The previous prime is 22981840939. The next prime is 22981840993. The reversal of 22981840961 is 16904818922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14670054400 + 8311786561 = 121120^2 + 91169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22981840961 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22981840061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11490920480 + 11490920481.

It is an arithmetic number, because the mean of its divisors is an integer number (11490920481).

Almost surely, 2^22981840961 is an apocalyptic number.

It is an amenable number.

22981840961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22981840961 is an equidigital number, since it uses as much as digits as its factorization.

22981840961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 50.

The spelling of 22981840961 in words is "twenty-two billion, nine hundred eighty-one million, eight hundred forty thousand, nine hundred sixty-one".