561116177 has 2 divisors, whose sum is σ = 561116178. Its totient is φ = 561116176.

The previous prime is 561116147. The next prime is 561116219. The reversal of 561116177 is 771611165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328370641 + 232745536 = 18121^2 + 15256^2 .

It is a cyclic number.

It is not a de Polignac number, because 561116177 - 2⁸ = 561115921 is a prime.

It is not a weakly prime, because it can be changed into another prime (561116147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280558088 + 280558089.

It is an arithmetic number, because the mean of its divisors is an integer number (280558089).

Almost surely, 2^561116177 is an apocalyptic number.

It is an amenable number.

561116177 is a deficient number, since it is larger than the sum of its proper divisors (1).

561116177 is an equidigital number, since it uses as much as digits as its factorization.

561116177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 35.

The square root of 561116177 is about 23687.8909360880. The cubic root of 561116177 is about 824.8043255554.

The spelling of 561116177 in words is "five hundred sixty-one million, one hundred sixteen thousand, one hundred seventy-seven".