561672222779 has 2 divisors, whose sum is σ = 561672222780. Its totient is φ = 561672222778.

The previous prime is 561672222763. The next prime is 561672222781. The reversal of 561672222779 is 977222276165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561672222779 - 2⁴ = 561672222763 is a prime.

Together with 561672222781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561672222079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280836111389 + 280836111390.

It is an arithmetic number, because the mean of its divisors is an integer number (280836111390).

Almost surely, 2^561672222779 is an apocalyptic number.

561672222779 is a deficient number, since it is larger than the sum of its proper divisors (1).

561672222779 is an equidigital number, since it uses as much as digits as its factorization.

561672222779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 56.

The spelling of 561672222779 in words is "five hundred sixty-one billion, six hundred seventy-two million, two hundred twenty-two thousand, seven hundred seventy-nine".