136505005091 has 16 divisors (see below), whose sum is σ = 173425717248. Its totient is φ = 104519959200.

The previous prime is 136505005079. The next prime is 136505005123. The reversal of 136505005091 is 190500505631.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136505005091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136505005691) 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 15 ways as a sum of consecutive naturals, for example, 24191615 + ... + 24197256.

It is an arithmetic number, because the mean of its divisors is an integer number (10839107328).

Almost surely, 2^136505005091 is an apocalyptic number.

136505005091 is a deficient number, since it is larger than the sum of its proper divisors (36920712157).

136505005091 is a wasteful number, since it uses less digits than its factorization.

136505005091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48388922.

The product of its (nonzero) digits is 20250, while the sum is 35.

The spelling of 136505005091 in words is "one hundred thirty-six billion, five hundred five million, five thousand, ninety-one".