136511423521 has 8 divisors (see below), whose sum is σ = 152946460224. Its totient is φ = 120747204720.

The previous prime is 136511423483. The next prime is 136511423527. The reversal of 136511423521 is 125324115631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136511423521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136511423527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167704045 + ... + 167704858.

It is an arithmetic number, because the mean of its divisors is an integer number (19118307528).

Almost surely, 2^136511423521 is an apocalyptic number.

136511423521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136511423521 is a deficient number, since it is larger than the sum of its proper divisors (16435036703).

136511423521 is a wasteful number, since it uses less digits than its factorization.

136511423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335408951.

The product of its digits is 21600, while the sum is 34.

The spelling of 136511423521 in words is "one hundred thirty-six billion, five hundred eleven million, four hundred twenty-three thousand, five hundred twenty-one".