136855791 has 16 divisors (see below), whose sum is σ = 204721920. Its totient is φ = 90349560.

The previous prime is 136855777. The next prime is 136855811. The reversal of 136855791 is 197558631.

It is a happy number.

136855791 is a `hidden beast` number, since 1 + 3 + 6 + 8 + 557 + 91 = 666.

It is not a de Polignac number, because 136855791 - 2²⁶ = 69746927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136855291) 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 15 ways as a sum of consecutive naturals, for example, 21825 + ... + 27386.

It is an arithmetic number, because the mean of its divisors is an integer number (12795120).

Almost surely, 2^136855791 is an apocalyptic number.

136855791 is a deficient number, since it is larger than the sum of its proper divisors (67866129).

136855791 is a wasteful number, since it uses less digits than its factorization.

136855791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49323 (or 49317 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 136855791 is about 11698.5379855775. The cubic root of 136855791 is about 515.3327299681.

The spelling of 136855791 in words is "one hundred thirty-six million, eight hundred fifty-five thousand, seven hundred ninety-one".