5561004091 has 2 divisors, whose sum is σ = 5561004092. Its totient is φ = 5561004090.

The previous prime is 5561004077. The next prime is 5561004109. The reversal of 5561004091 is 1904001655.

Together with next prime (5561004109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5561004091 - 2¹¹ = 5561002043 is a prime.

It is a super-3 number, since 3×5561004091³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (5561004191) 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, 2780502045 + 2780502046.

It is an arithmetic number, because the mean of its divisors is an integer number (2780502046).

Almost surely, 2^5561004091 is an apocalyptic number.

5561004091 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561004091 is an equidigital number, since it uses as much as digits as its factorization.

5561004091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 5561004091 is about 74572.1401798286. The cubic root of 5561004091 is about 1771.6764194154.

The spelling of 5561004091 in words is "five billion, five hundred sixty-one million, four thousand, ninety-one".