13565161803 has 4 divisors (see below), whose sum is σ = 18086882408. Its totient is φ = 9043441200.

The previous prime is 13565161801. The next prime is 13565161837. The reversal of 13565161803 is 30816156531.

13565161803 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 is not a de Polignac number, because 13565161803 - 2¹ = 13565161801 is a prime.

It is a super-2 number, since 2×13565161803² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13565161801) 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, 2260860298 + ... + 2260860303.

It is an arithmetic number, because the mean of its divisors is an integer number (4521720602).

Almost surely, 2^13565161803 is an apocalyptic number.

13565161803 is a deficient number, since it is larger than the sum of its proper divisors (4521720605).

13565161803 is an equidigital number, since it uses as much as digits as its factorization.

13565161803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521720604.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 13565161803 in words is "thirteen billion, five hundred sixty-five million, one hundred sixty-one thousand, eight hundred three".