116556161 has 2 divisors, whose sum is σ = 116556162. Its totient is φ = 116556160.

The previous prime is 116556151. The next prime is 116556173. The reversal of 116556161 is 161655611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78499600 + 38056561 = 8860^2 + 6169^2 .

It is a cyclic number.

It is not a de Polignac number, because 116556161 - 2¹⁰ = 116555137 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (116556151) 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, 58278080 + 58278081.

It is an arithmetic number, because the mean of its divisors is an integer number (58278081).

Almost surely, 2^116556161 is an apocalyptic number.

It is an amenable number.

116556161 is a deficient number, since it is larger than the sum of its proper divisors (1).

116556161 is an equidigital number, since it uses as much as digits as its factorization.

116556161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 116556161 is about 10796.1178670854. The cubic root of 116556161 is about 488.4780780828.

The spelling of 116556161 in words is "one hundred sixteen million, five hundred fifty-six thousand, one hundred sixty-one".