136388266549 has 2 divisors, whose sum is σ = 136388266550. Its totient is φ = 136388266548.

The previous prime is 136388266543. The next prime is 136388266681. The reversal of 136388266549 is 945662883631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83330368900 + 53057897649 = 288670^2 + 230343^2 .

It is an emirp because it is prime and its reverse (945662883631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136388266549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136388266543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68194133274 + 68194133275.

It is an arithmetic number, because the mean of its divisors is an integer number (68194133275).

Almost surely, 2^136388266549 is an apocalyptic number.

It is an amenable number.

136388266549 is a deficient number, since it is larger than the sum of its proper divisors (1).

136388266549 is an equidigital number, since it uses as much as digits as its factorization.

136388266549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44789760, while the sum is 61.

The spelling of 136388266549 in words is "one hundred thirty-six billion, three hundred eighty-eight million, two hundred sixty-six thousand, five hundred forty-nine".