805016056591 has 2 divisors, whose sum is σ = 805016056592. Its totient is φ = 805016056590.

The previous prime is 805016056571. The next prime is 805016056597. The reversal of 805016056591 is 195650610508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 805016056591 - 2⁹ = 805016056079 is a prime.

It is a super-2 number, since 2×805016056591² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805016056597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402508028295 + 402508028296.

It is an arithmetic number, because the mean of its divisors is an integer number (402508028296).

Almost surely, 2^805016056591 is an apocalyptic number.

805016056591 is a deficient number, since it is larger than the sum of its proper divisors (1).

805016056591 is an equidigital number, since it uses as much as digits as its factorization.

805016056591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 805016056591 in words is "eight hundred five billion, sixteen million, fifty-six thousand, five hundred ninety-one".