13775561573 has 2 divisors, whose sum is σ = 13775561574. Its totient is φ = 13775561572.

The previous prime is 13775561549. The next prime is 13775561581. The reversal of 13775561573 is 37516557731.

13775561573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13739825089 + 35736484 = 117217^2 + 5978^2 .

It is a cyclic number.

It is not a de Polignac number, because 13775561573 - 2²⁴ = 13758784357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13775561593) 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 as a sum of consecutive naturals, namely, 6887780786 + 6887780787.

It is an arithmetic number, because the mean of its divisors is an integer number (6887780787).

Almost surely, 2^13775561573 is an apocalyptic number.

It is an amenable number.

13775561573 is a deficient number, since it is larger than the sum of its proper divisors (1).

13775561573 is an equidigital number, since it uses as much as digits as its factorization.

13775561573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2315250, while the sum is 50.

The spelling of 13775561573 in words is "thirteen billion, seven hundred seventy-five million, five hundred sixty-one thousand, five hundred seventy-three".