85431584671 has 2 divisors, whose sum is σ = 85431584672. Its totient is φ = 85431584670.

The previous prime is 85431584659. The next prime is 85431584737. The reversal of 85431584671 is 17648513458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85431584671 - 2⁹ = 85431584159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85431581671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42715792335 + 42715792336.

It is an arithmetic number, because the mean of its divisors is an integer number (42715792336).

Almost surely, 2^85431584671 is an apocalyptic number.

85431584671 is a deficient number, since it is larger than the sum of its proper divisors (1).

85431584671 is an equidigital number, since it uses as much as digits as its factorization.

85431584671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 52.

The spelling of 85431584671 in words is "eighty-five billion, four hundred thirty-one million, five hundred eighty-four thousand, six hundred seventy-one".