5517171691 has 2 divisors, whose sum is σ = 5517171692. Its totient is φ = 5517171690.

The previous prime is 5517171689. The next prime is 5517171731. The reversal of 5517171691 is 1961717155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5517171691 - 2¹ = 5517171689 is a prime.

Together with 5517171689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5517175691) 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, 2758585845 + 2758585846.

It is an arithmetic number, because the mean of its divisors is an integer number (2758585846).

Almost surely, 2^5517171691 is an apocalyptic number.

5517171691 is a deficient number, since it is larger than the sum of its proper divisors (1).

5517171691 is an equidigital number, since it uses as much as digits as its factorization.

5517171691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66150, while the sum is 43.

The square root of 5517171691 is about 74277.6661655440. Note that the first 3 decimals coincide. The cubic root of 5517171691 is about 1767.0092909980.

The spelling of 5517171691 in words is "five billion, five hundred seventeen million, one hundred seventy-one thousand, six hundred ninety-one".