136218726 has 48 divisors (see below), whose sum is σ = 352136880. Its totient is φ = 38918880.

The previous prime is 136218721. The next prime is 136218779. The reversal of 136218726 is 627812631.

136218726 is a `hidden beast` number, since 1 + 3 + 621 + 8 + 7 + 26 = 666.

136218726 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136218721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23095 + ... + 28386.

It is an arithmetic number, because the mean of its divisors is an integer number (7336185).

Almost surely, 2^136218726 is an apocalyptic number.

136218726 is an abundant number, since it is smaller than the sum of its proper divisors (215918154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136218726 is a wasteful number, since it uses less digits than its factorization.

136218726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51506 (or 51493 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 136218726 is about 11671.2778220724. The cubic root of 136218726 is about 514.5318597514.

The spelling of 136218726 in words is "one hundred thirty-six million, two hundred eighteen thousand, seven hundred twenty-six".