135585060517681 has 4 divisors (see below), whose sum is σ = 135585516087664. Its totient is φ = 135584604947700.

The previous prime is 135585060517667. The next prime is 135585060517727. The reversal of 135585060517681 is 186715060585531.

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.

It is a cyclic number.

It is not a de Polignac number, because 135585060517681 - 2¹¹ = 135585060515633 is a prime.

It is a super-2 number, since 2×135585060517681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135585060514681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227338275 + ... + 227933896.

It is an arithmetic number, because the mean of its divisors is an integer number (33896379021916).

Almost surely, 2^{135585060517681} is an apocalyptic number.

It is an amenable number.

135585060517681 is a deficient number, since it is larger than the sum of its proper divisors (455569983).

135585060517681 is an equidigital number, since it uses as much as digits as its factorization.

135585060517681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455569982.

The product of its (nonzero) digits is 30240000, while the sum is 61.

The spelling of 135585060517681 in words is "one hundred thirty-five trillion, five hundred eighty-five billion, sixty million, five hundred seventeen thousand, six hundred eighty-one".