136332561 has 4 divisors (see below), whose sum is σ = 181776752. Its totient is φ = 90888372.

The previous prime is 136332529. The next prime is 136332577. The reversal of 136332561 is 165233631.

It is a happy number.

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: 165233631 = 3 ⋅55077877.

It is not a de Polignac number, because 136332561 - 2⁵ = 136332529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136336561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22722091 + ... + 22722096.

It is an arithmetic number, because the mean of its divisors is an integer number (45444188).

Almost surely, 2^136332561 is an apocalyptic number.

It is an amenable number.

136332561 is a deficient number, since it is larger than the sum of its proper divisors (45444191).

136332561 is an equidigital number, since it uses as much as digits as its factorization.

136332561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45444190.

The product of its digits is 9720, while the sum is 30.

The square root of 136332561 is about 11676.1535190319. The cubic root of 136332561 is about 514.6751475059.

The spelling of 136332561 in words is "one hundred thirty-six million, three hundred thirty-two thousand, five hundred sixty-one".