136611161 has 2 divisors, whose sum is σ = 136611162. Its totient is φ = 136611160.

The previous prime is 136611149. The next prime is 136611169. The reversal of 136611161 is 161116631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98406400 + 38204761 = 9920^2 + 6181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136611161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136611161.

It is not a weakly prime, because it can be changed into another prime (136611169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68305580 + 68305581.

It is an arithmetic number, because the mean of its divisors is an integer number (68305581).

Almost surely, 2^136611161 is an apocalyptic number.

It is an amenable number.

136611161 is a deficient number, since it is larger than the sum of its proper divisors (1).

136611161 is an equidigital number, since it uses as much as digits as its factorization.

136611161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 136611161 is about 11688.0777290365. The cubic root of 136611161 is about 515.0254940721.

Adding to 136611161 its reverse (161116631), we get a palindrome (297727792).

The spelling of 136611161 in words is "one hundred thirty-six million, six hundred eleven thousand, one hundred sixty-one".