822206711561 has 2 divisors, whose sum is σ = 822206711562. Its totient is φ = 822206711560.

The previous prime is 822206711551. The next prime is 822206711581. The reversal of 822206711561 is 165117602228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537750889225 + 284455822336 = 733315^2 + 533344^2 .

It is a cyclic number.

It is not a de Polignac number, because 822206711561 - 2⁶ = 822206711497 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 (822206711551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411103355780 + 411103355781.

It is an arithmetic number, because the mean of its divisors is an integer number (411103355781).

Almost surely, 2^822206711561 is an apocalyptic number.

It is an amenable number.

822206711561 is a deficient number, since it is larger than the sum of its proper divisors (1).

822206711561 is an equidigital number, since it uses as much as digits as its factorization.

822206711561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 822206711561 in words is "eight hundred twenty-two billion, two hundred six million, seven hundred eleven thousand, five hundred sixty-one".