136691815 has 32 divisors (see below), whose sum is σ = 189012096. Its totient is φ = 94003200.

The previous prime is 136691791. The next prime is 136691831. The reversal of 136691815 is 518196631.

It is not a de Polignac number, because 136691815 - 2¹¹ = 136689767 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 113215 + ... + 114415.

It is an arithmetic number, because the mean of its divisors is an integer number (5906628).

Almost surely, 2^136691815 is an apocalyptic number.

136691815 is a deficient number, since it is larger than the sum of its proper divisors (52320281).

136691815 is a wasteful number, since it uses less digits than its factorization.

136691815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339.

The product of its digits is 38880, while the sum is 40.

The square root of 136691815 is about 11691.5274878863. The cubic root of 136691815 is about 515.1268296044.

The spelling of 136691815 in words is "one hundred thirty-six million, six hundred ninety-one thousand, eight hundred fifteen".