136561641 has 8 divisors (see below), whose sum is σ = 182571840. Its totient is φ = 90796272.

The previous prime is 136561637. The next prime is 136561657. The reversal of 136561641 is 146165631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136561641 - 2² = 136561637 is a prime.

It is a super-2 number, since 2×136561641² = 37298163585225762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (136561681) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 59901 + ... + 62138.

It is an arithmetic number, because the mean of its divisors is an integer number (22821480).

Almost surely, 2^136561641 is an apocalyptic number.

It is an amenable number.

136561641 is a deficient number, since it is larger than the sum of its proper divisors (46010199).

136561641 is a wasteful number, since it uses less digits than its factorization.

136561641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122415.

The product of its digits is 12960, while the sum is 33.

The square root of 136561641 is about 11685.9591390694. The cubic root of 136561641 is about 514.9632562468.

The spelling of 136561641 in words is "one hundred thirty-six million, five hundred sixty-one thousand, six hundred forty-one".