85008587491 has 2 divisors, whose sum is σ = 85008587492. Its totient is φ = 85008587490.

The previous prime is 85008587473. The next prime is 85008587507. The reversal of 85008587491 is 19478580058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85008587491 - 2³³ = 76418652899 is a prime.

It is not a weakly prime, because it can be changed into another prime (85008587441) 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, 42504293745 + 42504293746.

It is an arithmetic number, because the mean of its divisors is an integer number (42504293746).

Almost surely, 2^85008587491 is an apocalyptic number.

85008587491 is a deficient number, since it is larger than the sum of its proper divisors (1).

85008587491 is an equidigital number, since it uses as much as digits as its factorization.

85008587491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 85008587491 in words is "eighty-five billion, eight million, five hundred eighty-seven thousand, four hundred ninety-one".