136844520133 has 4 divisors (see below), whose sum is σ = 136981777420. Its totient is φ = 136707262848.

The previous prime is 136844520119. The next prime is 136844520149. The reversal of 136844520133 is 331025448631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331025448631 = 58549 ⋅5653819.

It can be written as a sum of positive squares in 2 ways, for example, as 44564054404 + 92280465729 = 211102^2 + 303777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136844520133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136844520433) 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, 68627148 + ... + 68629141.

It is an arithmetic number, because the mean of its divisors is an integer number (34245444355).

Almost surely, 2^136844520133 is an apocalyptic number.

It is an amenable number.

136844520133 is a deficient number, since it is larger than the sum of its proper divisors (137257287).

136844520133 is an equidigital number, since it uses as much as digits as its factorization.

136844520133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137257286.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 136844520133 its reverse (331025448631), we get a palindrome (467869968764).

The spelling of 136844520133 in words is "one hundred thirty-six billion, eight hundred forty-four million, five hundred twenty thousand, one hundred thirty-three".