561166722223 has 2 divisors, whose sum is σ = 561166722224. Its totient is φ = 561166722222.

The previous prime is 561166722209. The next prime is 561166722251. The reversal of 561166722223 is 322227661165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561166722223 - 2⁵ = 561166722191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561166722223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561160722223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280583361111 + 280583361112.

It is an arithmetic number, because the mean of its divisors is an integer number (280583361112).

Almost surely, 2^561166722223 is an apocalyptic number.

561166722223 is a deficient number, since it is larger than the sum of its proper divisors (1).

561166722223 is an equidigital number, since it uses as much as digits as its factorization.

561166722223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The spelling of 561166722223 in words is "five hundred sixty-one billion, one hundred sixty-six million, seven hundred twenty-two thousand, two hundred twenty-three".