22779766109 has 2 divisors, whose sum is σ = 22779766110. Its totient is φ = 22779766108.

The previous prime is 22779766073. The next prime is 22779766111. The reversal of 22779766109 is 90166797722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22038293209 + 741472900 = 148453^2 + 27230^2 .

It is a cyclic number.

It is not a de Polignac number, because 22779766109 - 2¹² = 22779762013 is a prime.

Together with 22779766111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22779766189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389883054 + 11389883055.

It is an arithmetic number, because the mean of its divisors is an integer number (11389883055).

Almost surely, 2^22779766109 is an apocalyptic number.

It is an amenable number.

22779766109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22779766109 is an equidigital number, since it uses as much as digits as its factorization.

22779766109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The spelling of 22779766109 in words is "twenty-two billion, seven hundred seventy-nine million, seven hundred sixty-six thousand, one hundred nine".