136605265187 has 2 divisors, whose sum is σ = 136605265188. Its totient is φ = 136605265186.

The previous prime is 136605265183. The next prime is 136605265207. The reversal of 136605265187 is 781562506631.

It is a weak prime.

It is an emirp because it is prime and its reverse (781562506631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136605265187 - 2² = 136605265183 is a prime.

It is not a weakly prime, because it can be changed into another prime (136605265183) 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, 68302632593 + 68302632594.

It is an arithmetic number, because the mean of its divisors is an integer number (68302632594).

Almost surely, 2^136605265187 is an apocalyptic number.

136605265187 is a deficient number, since it is larger than the sum of its proper divisors (1).

136605265187 is an equidigital number, since it uses as much as digits as its factorization.

136605265187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 136605265187 in words is "one hundred thirty-six billion, six hundred five million, two hundred sixty-five thousand, one hundred eighty-seven".