5505555555491 has 2 divisors, whose sum is σ = 5505555555492. Its totient is φ = 5505555555490.

The previous prime is 5505555555449. The next prime is 5505555555529. The reversal of 5505555555491 is 1945555555055.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5505555555491 is a prime.

It is a super-2 number, since 2×5505555555491² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5505555555491.

It is not a weakly prime, because it can be changed into another prime (5505555555391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752777777745 + 2752777777746.

It is an arithmetic number, because the mean of its divisors is an integer number (2752777777746).

Almost surely, 2^{5505555555491} is an apocalyptic number.

5505555555491 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505555555491 is an equidigital number, since it uses as much as digits as its factorization.

5505555555491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70312500, while the sum is 59.

The spelling of 5505555555491 in words is "five trillion, five hundred five billion, five hundred fifty-five million, five hundred fifty-five thousand, four hundred ninety-one".