5561172783409 has 2 divisors, whose sum is σ = 5561172783410. Its totient is φ = 5561172783408.

The previous prime is 5561172783349. The next prime is 5561172783433. The reversal of 5561172783409 is 9043872711655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5519210490000 + 41962293409 = 2349300^2 + 204847^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561172783409 - 2⁷ = 5561172783281 is a prime.

It is a super-2 number, since 2×5561172783409² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5561172783469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780586391704 + 2780586391705.

It is an arithmetic number, because the mean of its divisors is an integer number (2780586391705).

It is a 1-persistent number, because it is pandigital, but 2⋅5561172783409 = 11122345566818 is not.

Almost surely, 2^{5561172783409} is an apocalyptic number.

It is an amenable number.

5561172783409 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561172783409 is an equidigital number, since it uses as much as digits as its factorization.

5561172783409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 5561172783409 in words is "five trillion, five hundred sixty-one billion, one hundred seventy-two million, seven hundred eighty-three thousand, four hundred nine".