85871444293 has 4 divisors (see below), whose sum is σ = 90922705740. Its totient is φ = 80820182848.

The previous prime is 85871444291. The next prime is 85871444297. The reversal of 85871444293 is 39244417858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37977434884 + 47894009409 = 194878^2 + 218847^2 .

It is a cyclic number.

It is not a de Polignac number, because 85871444293 - 2¹ = 85871444291 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85871444291) 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 in 3 ways as a sum of consecutive naturals, for example, 2525630698 + ... + 2525630731.

It is an arithmetic number, because the mean of its divisors is an integer number (22730676435).

Almost surely, 2^85871444293 is an apocalyptic number.

It is an amenable number.

85871444293 is a deficient number, since it is larger than the sum of its proper divisors (5051261447).

85871444293 is a wasteful number, since it uses less digits than its factorization.

85871444293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051261446.

The product of its digits is 7741440, while the sum is 55.

The spelling of 85871444293 in words is "eighty-five billion, eight hundred seventy-one million, four hundred forty-four thousand, two hundred ninety-three".