5561491830203 has 2 divisors, whose sum is σ = 5561491830204. Its totient is φ = 5561491830202.

The previous prime is 5561491830157. The next prime is 5561491830221. The reversal of 5561491830203 is 3020381941655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5561491830203 is a prime.

It is not a weakly prime, because it can be changed into another prime (5561491832203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780745915101 + 2780745915102.

It is an arithmetic number, because the mean of its divisors is an integer number (2780745915102).

Almost surely, 2^{5561491830203} is an apocalyptic number.

5561491830203 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561491830203 is an equidigital number, since it uses as much as digits as its factorization.

5561491830203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 5561491830203 in words is "five trillion, five hundred sixty-one billion, four hundred ninety-one million, eight hundred thirty thousand, two hundred three".