136305667657 has 2 divisors, whose sum is σ = 136305667658. Its totient is φ = 136305667656.

The previous prime is 136305667643. The next prime is 136305667681. The reversal of 136305667657 is 756766503631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103043568016 + 33262099641 = 321004^2 + 182379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136305667657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136305667598 and 136305667607.

It is not a weakly prime, because it can be changed into another prime (136305667957) 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, 68152833828 + 68152833829.

It is an arithmetic number, because the mean of its divisors is an integer number (68152833829).

Almost surely, 2^136305667657 is an apocalyptic number.

It is an amenable number.

136305667657 is a deficient number, since it is larger than the sum of its proper divisors (1).

136305667657 is an equidigital number, since it uses as much as digits as its factorization.

136305667657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14288400, while the sum is 55.

The spelling of 136305667657 in words is "one hundred thirty-six billion, three hundred five million, six hundred sixty-seven thousand, six hundred fifty-seven".