85439785684 has 24 divisors (see below), whose sum is σ = 166189913568. Its totient is φ = 38103505440.

The previous prime is 85439785681. The next prime is 85439785687. The reversal of 85439785684 is 48658793458.

It is an interprime number because it is at equal distance from previous prime (85439785681) and next prime (85439785687).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85439785681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18316662 + ... + 18321325.

It is an arithmetic number, because the mean of its divisors is an integer number (6924579732).

Almost surely, 2^85439785684 is an apocalyptic number.

It is an amenable number.

85439785684 is a deficient number, since it is larger than the sum of its proper divisors (80750127884).

85439785684 is a wasteful number, since it uses less digits than its factorization.

85439785684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36638055 (or 36638053 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 67.

The spelling of 85439785684 in words is "eighty-five billion, four hundred thirty-nine million, seven hundred eighty-five thousand, six hundred eighty-four".