136618108673 has 4 divisors (see below), whose sum is σ = 136773181188. Its totient is φ = 136463036160.

The previous prime is 136618108663. The next prime is 136618108703. The reversal of 136618108673 is 376801816631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376801816631 = 17 ⋅22164812743.

It can be written as a sum of positive squares in 2 ways, for example, as 32345303104 + 104272805569 = 179848^2 + 322913^2 .

It is a cyclic number.

It is not a de Polignac number, because 136618108673 - 2²⁸ = 136349673217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136618108633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77534936 + ... + 77536697.

It is an arithmetic number, because the mean of its divisors is an integer number (34193295297).

Almost surely, 2^136618108673 is an apocalyptic number.

It is an amenable number.

136618108673 is a deficient number, since it is larger than the sum of its proper divisors (155072515).

136618108673 is an equidigital number, since it uses as much as digits as its factorization.

136618108673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155072514.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 136618108673 in words is "one hundred thirty-six billion, six hundred eighteen million, one hundred eight thousand, six hundred seventy-three".