85858356839 has 4 divisors (see below), whose sum is σ = 87855062856. Its totient is φ = 83861650824.

The previous prime is 85858356821. The next prime is 85858356887. The reversal of 85858356839 is 93865385858.

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

It is a cyclic number.

It is not a de Polignac number, because 85858356839 - 2¹² = 85858352743 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 (85858356139) 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 in 3 ways as a sum of consecutive naturals, for example, 998352944 + ... + 998353029.

It is an arithmetic number, because the mean of its divisors is an integer number (21963765714).

Almost surely, 2^85858356839 is an apocalyptic number.

85858356839 is a deficient number, since it is larger than the sum of its proper divisors (1996706017).

85858356839 is a wasteful number, since it uses less digits than its factorization.

85858356839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996706016.

The product of its digits is 248832000, while the sum is 68.

The spelling of 85858356839 in words is "eighty-five billion, eight hundred fifty-eight million, three hundred fifty-six thousand, eight hundred thirty-nine".