26561361137 has 2 divisors, whose sum is σ = 26561361138. Its totient is φ = 26561361136.

The previous prime is 26561361107. The next prime is 26561361143. The reversal of 26561361137 is 73116316562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24510720481 + 2050640656 = 156559^2 + 45284^2 .

It is a cyclic number.

It is not a de Polignac number, because 26561361137 - 2³⁴ = 9381491953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26561361094 and 26561361103.

It is not a weakly prime, because it can be changed into another prime (26561361107) by changing a digit.

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 as a sum of consecutive naturals, namely, 13280680568 + 13280680569.

It is an arithmetic number, because the mean of its divisors is an integer number (13280680569).

Almost surely, 2^26561361137 is an apocalyptic number.

It is an amenable number.

26561361137 is a deficient number, since it is larger than the sum of its proper divisors (1).

26561361137 is an equidigital number, since it uses as much as digits as its factorization.

26561361137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

Adding to 26561361137 its reverse (73116316562), we get a palindrome (99677677699).

The spelling of 26561361137 in words is "twenty-six billion, five hundred sixty-one million, three hundred sixty-one thousand, one hundred thirty-seven".