85142243587 has 2 divisors, whose sum is σ = 85142243588. Its totient is φ = 85142243586.

The previous prime is 85142243551. The next prime is 85142243713. The reversal of 85142243587 is 78534224158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85142243587 - 2¹¹ = 85142241539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85142243587.

It is not a weakly prime, because it can be changed into another prime (85142240587) 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, 42571121793 + 42571121794.

It is an arithmetic number, because the mean of its divisors is an integer number (42571121794).

Almost surely, 2^85142243587 is an apocalyptic number.

85142243587 is a deficient number, since it is larger than the sum of its proper divisors (1).

85142243587 is an equidigital number, since it uses as much as digits as its factorization.

85142243587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2150400, while the sum is 49.

The spelling of 85142243587 in words is "eighty-five billion, one hundred forty-two million, two hundred forty-three thousand, five hundred eighty-seven".