136561015 has 8 divisors (see below), whose sum is σ = 164560320. Its totient is φ = 108790752.

The previous prime is 136561013. The next prime is 136561021. The reversal of 136561015 is 510165631.

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

It is a cyclic number.

It is not a de Polignac number, because 136561015 - 2¹ = 136561013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136561013) 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, 55944 + ... + 58333.

It is an arithmetic number, because the mean of its divisors is an integer number (20570040).

Almost surely, 2^136561015 is an apocalyptic number.

136561015 is a deficient number, since it is larger than the sum of its proper divisors (27999305).

136561015 is a wasteful number, since it uses less digits than its factorization.

136561015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114521.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 136561015 is about 11685.9323547589. The cubic root of 136561015 is about 514.9624693799.

The spelling of 136561015 in words is "one hundred thirty-six million, five hundred sixty-one thousand, fifteen".