136691555 has 64 divisors (see below), whose sum is σ = 227598336. Its totient is φ = 76032000.

The previous prime is 136691531. The next prime is 136691563. The reversal of 136691555 is 555196631.

It is a happy number.

It is not a de Polignac number, because 136691555 - 2⁸ = 136691299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 154715 + ... + 155595.

It is an arithmetic number, because the mean of its divisors is an integer number (3556224).

Almost surely, 2^136691555 is an apocalyptic number.

136691555 is a deficient number, since it is larger than the sum of its proper divisors (90906781).

136691555 is a wasteful number, since it uses less digits than its factorization.

136691555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948.

The product of its digits is 121500, while the sum is 41.

The square root of 136691555 is about 11691.5163687180. The cubic root of 136691555 is about 515.1265029985.

The spelling of 136691555 in words is "one hundred thirty-six million, six hundred ninety-one thousand, five hundred fifty-five".