136560981505 has 12 divisors (see below), whose sum is σ = 177448471740. Its totient is φ = 100845031872.

The previous prime is 136560981467. The next prime is 136560981523. The reversal of 136560981505 is 505189065631.

It can be written as a sum of positive squares in 6 ways, for example, as 18890028481 + 117670953024 = 137441^2 + 343032^2 .

It is not a de Polignac number, because 136560981505 - 2⁹ = 136560980993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80804470 + ... + 80806159.

It is an arithmetic number, because the mean of its divisors is an integer number (14787372645).

Almost surely, 2^136560981505 is an apocalyptic number.

It is an amenable number.

136560981505 is a deficient number, since it is larger than the sum of its proper divisors (40887490235).

136560981505 is a wasteful number, since it uses less digits than its factorization.

136560981505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161610660 (or 161610647 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 136560981505 in words is "one hundred thirty-six billion, five hundred sixty million, nine hundred eighty-one thousand, five hundred five".