13500555161 has 4 divisors (see below), whose sum is σ = 13500800292. Its totient is φ = 13500310032.

The previous prime is 13500555121. The next prime is 13500555179. The reversal of 13500555161 is 16155500531.

13500555161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12090102025 + 1410453136 = 109955^2 + 37556^2 .

It is a cyclic number.

It is not a de Polignac number, because 13500555161 - 2¹⁸ = 13500293017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13500555121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771 + ... + 164343.

It is an arithmetic number, because the mean of its divisors is an integer number (3375200073).

Almost surely, 2^13500555161 is an apocalyptic number.

It is an amenable number.

13500555161 is a deficient number, since it is larger than the sum of its proper divisors (245131).

13500555161 is an equidigital number, since it uses as much as digits as its factorization.

13500555161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245130.

The product of its (nonzero) digits is 11250, while the sum is 32.

The spelling of 13500555161 in words is "thirteen billion, five hundred million, five hundred fifty-five thousand, one hundred sixty-one".