5561945087 has 2 divisors, whose sum is σ = 5561945088. Its totient is φ = 5561945086.

The previous prime is 5561945057. The next prime is 5561945099. The reversal of 5561945087 is 7805491655.

5561945087 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5561945087 - 2²⁴ = 5545167871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561945017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780972543 + 2780972544.

It is an arithmetic number, because the mean of its divisors is an integer number (2780972544).

Almost surely, 2^5561945087 is an apocalyptic number.

5561945087 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561945087 is an equidigital number, since it uses as much as digits as its factorization.

5561945087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The square root of 5561945087 is about 74578.4492128926. The cubic root of 5561945087 is about 1771.7763441995.

The spelling of 5561945087 in words is "five billion, five hundred sixty-one million, nine hundred forty-five thousand, eighty-seven".