136644159 has 4 divisors (see below), whose sum is σ = 182192216. Its totient is φ = 91096104.

The previous prime is 136644133. The next prime is 136644161. The reversal of 136644159 is 951446631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 136644159 - 2⁷ = 136644031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136644119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22774024 + ... + 22774029.

It is an arithmetic number, because the mean of its divisors is an integer number (45548054).

Almost surely, 2^136644159 is an apocalyptic number.

136644159 is a deficient number, since it is larger than the sum of its proper divisors (45548057).

136644159 is an equidigital number, since it uses as much as digits as its factorization.

136644159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45548056.

The product of its digits is 77760, while the sum is 39.

The square root of 136644159 is about 11689.4892531710. The cubic root of 136644159 is about 515.0669583345.

The spelling of 136644159 in words is "one hundred thirty-six million, six hundred forty-four thousand, one hundred fifty-nine".