5548121869 has 2 divisors, whose sum is σ = 5548121870. Its totient is φ = 5548121868.

The previous prime is 5548121849. The next prime is 5548121899. The reversal of 5548121869 is 9681218455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3141042025 + 2407079844 = 56045^2 + 49062^2 .

It is a cyclic number.

It is not a de Polignac number, because 5548121869 - 2¹¹ = 5548119821 is a prime.

It is a super-2 number, since 2×5548121869² = 61563312546552106322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5548121849) 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, 2774060934 + 2774060935.

It is an arithmetic number, because the mean of its divisors is an integer number (2774060935).

Almost surely, 2^5548121869 is an apocalyptic number.

It is an amenable number.

5548121869 is a deficient number, since it is larger than the sum of its proper divisors (1).

5548121869 is an equidigital number, since it uses as much as digits as its factorization.

5548121869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 49.

The square root of 5548121869 is about 74485.7158722396. The cubic root of 5548121869 is about 1770.3073156372.

The spelling of 5548121869 in words is "five billion, five hundred forty-eight million, one hundred twenty-one thousand, eight hundred sixty-nine".