136560881 has 12 divisors (see below), whose sum is σ = 147076332. Its totient is φ = 126747648.

The previous prime is 136560871. The next prime is 136560887. The reversal of 136560881 is 188065631.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3389281 + 133171600 = 1841^2 + 11540^2 .

It is not a de Polignac number, because 136560881 - 2¹⁴ = 136544497 is a prime.

It is a super-2 number, since 2×136560881² = 37297748438992322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136560887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17861 + ... + 24333.

It is an arithmetic number, because the mean of its divisors is an integer number (12256361).

Almost surely, 2^136560881 is an apocalyptic number.

It is an amenable number.

136560881 is a deficient number, since it is larger than the sum of its proper divisors (10515451).

136560881 is an equidigital number, since it uses as much as digits as its factorization.

136560881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580 (or 6563 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 136560881 is about 11685.9266213681. The cubic root of 136560881 is about 514.9623009448.

The spelling of 136560881 in words is "one hundred thirty-six million, five hundred sixty thousand, eight hundred eighty-one".