136185566617 has 2 divisors, whose sum is σ = 136185566618. Its totient is φ = 136185566616.

The previous prime is 136185566591. The next prime is 136185566623. The reversal of 136185566617 is 716665581631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123661942336 + 12523624281 = 351656^2 + 111909^2 .

It is a cyclic number.

It is not a de Polignac number, because 136185566617 - 2²³ = 136177178009 is a prime.

It is not a weakly prime, because it can be changed into another prime (136185566677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68092783308 + 68092783309.

It is an arithmetic number, because the mean of its divisors is an integer number (68092783309).

Almost surely, 2^136185566617 is an apocalyptic number.

It is an amenable number.

136185566617 is a deficient number, since it is larger than the sum of its proper divisors (1).

136185566617 is an equidigital number, since it uses as much as digits as its factorization.

136185566617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 55.

The spelling of 136185566617 in words is "one hundred thirty-six billion, one hundred eighty-five million, five hundred sixty-six thousand, six hundred seventeen".