136773656909 has 2 divisors, whose sum is σ = 136773656910. Its totient is φ = 136773656908.

The previous prime is 136773656897. The next prime is 136773656953. The reversal of 136773656909 is 909656377631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120254981284 + 16518675625 = 346778^2 + 128525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136773656909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136773656969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68386828454 + 68386828455.

It is an arithmetic number, because the mean of its divisors is an integer number (68386828455).

Almost surely, 2^136773656909 is an apocalyptic number.

It is an amenable number.

136773656909 is a deficient number, since it is larger than the sum of its proper divisors (1).

136773656909 is an equidigital number, since it uses as much as digits as its factorization.

136773656909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38578680, while the sum is 62.

The spelling of 136773656909 in words is "one hundred thirty-six billion, seven hundred seventy-three million, six hundred fifty-six thousand, nine hundred nine".