5561161049 has 2 divisors, whose sum is σ = 5561161050. Its totient is φ = 5561161048.

The previous prime is 5561161033. The next prime is 5561161141. The reversal of 5561161049 is 9401611655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3664123024 + 1897038025 = 60532^2 + 43555^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561161049 - 2⁴ = 5561161033 is a prime.

It is not a weakly prime, because it can be changed into another prime (5561161019) 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, 2780580524 + 2780580525.

It is an arithmetic number, because the mean of its divisors is an integer number (2780580525).

Almost surely, 2^5561161049 is an apocalyptic number.

It is an amenable number.

5561161049 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561161049 is an equidigital number, since it uses as much as digits as its factorization.

5561161049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 5561161049 is about 74573.1925627433. The cubic root of 5561161049 is about 1771.6930876386.

The spelling of 5561161049 in words is "five billion, five hundred sixty-one million, one hundred sixty-one thousand, forty-nine".