13144411561 has 2 divisors, whose sum is σ = 13144411562. Its totient is φ = 13144411560.

The previous prime is 13144411507. The next prime is 13144411591. The reversal of 13144411561 is 16511444131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7687782400 + 5456629161 = 87680^2 + 73869^2 .

It is a cyclic number.

It is not a de Polignac number, because 13144411561 - 2¹³ = 13144403369 is a prime.

It is not a weakly prime, because it can be changed into another prime (13144411591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6572205780 + 6572205781.

It is an arithmetic number, because the mean of its divisors is an integer number (6572205781).

Almost surely, 2^13144411561 is an apocalyptic number.

It is an amenable number.

13144411561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13144411561 is an equidigital number, since it uses as much as digits as its factorization.

13144411561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

Adding to 13144411561 its reverse (16511444131), we get a palindrome (29655855692).

The spelling of 13144411561 in words is "thirteen billion, one hundred forty-four million, four hundred eleven thousand, five hundred sixty-one".