118559561 has 2 divisors, whose sum is σ = 118559562. Its totient is φ = 118559560.

The previous prime is 118559509. The next prime is 118559591. The reversal of 118559561 is 165955811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113635600 + 4923961 = 10660^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 118559561 - 2²⁶ = 51450697 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 (118559501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59279780 + 59279781.

It is an arithmetic number, because the mean of its divisors is an integer number (59279781).

Almost surely, 2^118559561 is an apocalyptic number.

It is an amenable number.

118559561 is a deficient number, since it is larger than the sum of its proper divisors (1).

118559561 is an equidigital number, since it uses as much as digits as its factorization.

118559561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 41.

The square root of 118559561 is about 10888.5059121993. The cubic root of 118559561 is about 491.2608939479.

The spelling of 118559561 in words is "one hundred eighteen million, five hundred fifty-nine thousand, five hundred sixty-one".