6591242591 has 2 divisors, whose sum is σ = 6591242592. Its totient is φ = 6591242590.

The previous prime is 6591242587. The next prime is 6591242611. The reversal of 6591242591 is 1952421956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6591242591 - 2² = 6591242587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6591242501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3295621295 + 3295621296.

It is an arithmetic number, because the mean of its divisors is an integer number (3295621296).

Almost surely, 2^6591242591 is an apocalyptic number.

6591242591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6591242591 is an equidigital number, since it uses as much as digits as its factorization.

6591242591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 6591242591 is about 81186.4680288532. The cubic root of 6591242591 is about 1874.9474441921.

The spelling of 6591242591 in words is "six billion, five hundred ninety-one million, two hundred forty-two thousand, five hundred ninety-one".