136641513 has 4 divisors (see below), whose sum is σ = 182188688. Its totient is φ = 91094340.

The previous prime is 136641511. The next prime is 136641517. The reversal of 136641513 is 315146631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315146631 = 3 ⋅105048877.

It is not a de Polignac number, because 136641513 - 2¹ = 136641511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136641511) 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, 22773583 + ... + 22773588.

It is an arithmetic number, because the mean of its divisors is an integer number (45547172).

Almost surely, 2^136641513 is an apocalyptic number.

It is an amenable number.

136641513 is a deficient number, since it is larger than the sum of its proper divisors (45547175).

136641513 is an equidigital number, since it uses as much as digits as its factorization.

136641513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45547174.

The product of its digits is 6480, while the sum is 30.

The square root of 136641513 is about 11689.3760740255. The cubic root of 136641513 is about 515.0636336993.

The spelling of 136641513 in words is "one hundred thirty-six million, six hundred forty-one thousand, five hundred thirteen".