2081006591 has 2 divisors, whose sum is σ = 2081006592. Its totient is φ = 2081006590.

The previous prime is 2081006519. The next prime is 2081006593. The reversal of 2081006591 is 1956001802.

Together with previous prime (2081006519) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2081006591 - 2¹⁰ = 2081005567 is a prime.

Together with 2081006593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081006593) 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, 1040503295 + 1040503296.

It is an arithmetic number, because the mean of its divisors is an integer number (1040503296).

Almost surely, 2^2081006591 is an apocalyptic number.

2081006591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081006591 is an equidigital number, since it uses as much as digits as its factorization.

2081006591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 2081006591 is about 45618.0511530249. The cubic root of 2081006591 is about 1276.7067423136.

The spelling of 2081006591 in words is "two billion, eighty-one million, six thousand, five hundred ninety-one".