13565444540455 has 4 divisors (see below), whose sum is σ = 16278533448552. Its totient is φ = 10852355632360.

The previous prime is 13565444540441. The next prime is 13565444540497. The reversal of 13565444540455 is 55404544456531.

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

It is not a de Polignac number, because 13565444540455 - 2²³ = 13565436151847 is a prime.

It is a super-2 number, since 2×13565444540455² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13565444540396 and 13565444540405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356544454041 + ... + 1356544454050.

It is an arithmetic number, because the mean of its divisors is an integer number (4069633362138).

Almost surely, 2^{13565444540455} is an apocalyptic number.

13565444540455 is a deficient number, since it is larger than the sum of its proper divisors (2713088908097).

13565444540455 is an equidigital number, since it uses as much as digits as its factorization.

13565444540455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713088908096.

The product of its (nonzero) digits is 57600000, while the sum is 55.

Adding to 13565444540455 its reverse (55404544456531), we get a palindrome (68969988996986).

The spelling of 13565444540455 in words is "thirteen trillion, five hundred sixty-five billion, four hundred forty-four million, five hundred forty thousand, four hundred fifty-five".