136780967809 has 2 divisors, whose sum is σ = 136780967810. Its totient is φ = 136780967808.

The previous prime is 136780967801. The next prime is 136780967849. The reversal of 136780967809 is 908769087631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104359364209 + 32421603600 = 323047^2 + 180060^2 .

It is a cyclic number.

It is not a de Polignac number, because 136780967809 - 2³ = 136780967801 is a prime.

It is not a weakly prime, because it can be changed into another prime (136780967801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68390483904 + 68390483905.

It is an arithmetic number, because the mean of its divisors is an integer number (68390483905).

Almost surely, 2^136780967809 is an apocalyptic number.

It is an amenable number.

136780967809 is a deficient number, since it is larger than the sum of its proper divisors (1).

136780967809 is an equidigital number, since it uses as much as digits as its factorization.

136780967809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 136780967809 in words is "one hundred thirty-six billion, seven hundred eighty million, nine hundred sixty-seven thousand, eight hundred nine".