22105779961 has 8 divisors (see below), whose sum is σ = 22232685384. Its totient is φ = 21978927360.

The previous prime is 22105779959. The next prime is 22105779973. The reversal of 22105779961 is 16997750122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 235806736 + 21869973225 = 15356^2 + 147885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22105779961 - 2¹ = 22105779959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22105779991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085505 + ... + 1105681.

It is an arithmetic number, because the mean of its divisors is an integer number (2779085673).

Almost surely, 2^22105779961 is an apocalyptic number.

It is an amenable number.

22105779961 is a deficient number, since it is larger than the sum of its proper divisors (126905423).

22105779961 is a wasteful number, since it uses less digits than its factorization.

22105779961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26411.

The product of its (nonzero) digits is 476280, while the sum is 49.

The spelling of 22105779961 in words is "twenty-two billion, one hundred five million, seven hundred seventy-nine thousand, nine hundred sixty-one".