136404155 has 4 divisors (see below), whose sum is σ = 163684992. Its totient is φ = 109123320.

The previous prime is 136404133. The next prime is 136404167. The reversal of 136404155 is 551404631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551404631 = 113 ⋅4879687.

It is not a de Polignac number, because 136404155 - 2²² = 132209851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13640411 + ... + 13640420.

It is an arithmetic number, because the mean of its divisors is an integer number (40921248).

Almost surely, 2^136404155 is an apocalyptic number.

136404155 is a deficient number, since it is larger than the sum of its proper divisors (27280837).

136404155 is an equidigital number, since it uses as much as digits as its factorization.

136404155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27280836.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 136404155 is about 11679.2189379256. The cubic root of 136404155 is about 514.7652243103.

Adding to 136404155 its reverse (551404631), we get a palindrome (687808786).

The spelling of 136404155 in words is "one hundred thirty-six million, four hundred four thousand, one hundred fifty-five".