136331864161 has 2 divisors, whose sum is σ = 136331864162. Its totient is φ = 136331864160.

The previous prime is 136331864153. The next prime is 136331864177. The reversal of 136331864161 is 161468133631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131737057936 + 4594806225 = 362956^2 + 67785^2 .

It is a cyclic number.

It is not a de Polignac number, because 136331864161 - 2³ = 136331864153 is a prime.

It is a super-2 number, since 2×136331864161² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136331864131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68165932080 + 68165932081.

It is an arithmetic number, because the mean of its divisors is an integer number (68165932081).

Almost surely, 2^136331864161 is an apocalyptic number.

It is an amenable number.

136331864161 is a deficient number, since it is larger than the sum of its proper divisors (1).

136331864161 is an equidigital number, since it uses as much as digits as its factorization.

136331864161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

Adding to 136331864161 its reverse (161468133631), we get a palindrome (297799997792).

The spelling of 136331864161 in words is "one hundred thirty-six billion, three hundred thirty-one million, eight hundred sixty-four thousand, one hundred sixty-one".