136511161 has 2 divisors, whose sum is σ = 136511162. Its totient is φ = 136511160.

The previous prime is 136511159. The next prime is 136511183. The reversal of 136511161 is 161115631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130965136 + 5546025 = 11444^2 + 2355^2 .

It is a cyclic number.

It is not a de Polignac number, because 136511161 - 2¹ = 136511159 is a prime.

Together with 136511159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136511261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68255580 + 68255581.

It is an arithmetic number, because the mean of its divisors is an integer number (68255581).

Almost surely, 2^136511161 is an apocalyptic number.

It is an amenable number.

136511161 is a deficient number, since it is larger than the sum of its proper divisors (1).

136511161 is an equidigital number, since it uses as much as digits as its factorization.

136511161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 25.

The square root of 136511161 is about 11683.7990824902. The cubic root of 136511161 is about 514.8997963842.

Adding to 136511161 its reverse (161115631), we get a palindrome (297626792).

The spelling of 136511161 in words is "one hundred thirty-six million, five hundred eleven thousand, one hundred sixty-one".