13044809861 has 2 divisors, whose sum is σ = 13044809862. Its totient is φ = 13044809860.

The previous prime is 13044809837. The next prime is 13044809887. The reversal of 13044809861 is 16890844031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7971096961 + 5073712900 = 89281^2 + 71230^2 .

It is a cyclic number.

It is not a de Polignac number, because 13044809861 - 2⁶ = 13044809797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13044809161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6522404930 + 6522404931.

It is an arithmetic number, because the mean of its divisors is an integer number (6522404931).

Almost surely, 2^13044809861 is an apocalyptic number.

It is an amenable number.

13044809861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13044809861 is an equidigital number, since it uses as much as digits as its factorization.

13044809861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 13044809861 in words is "thirteen billion, forty-four million, eight hundred nine thousand, eight hundred sixty-one".