85384639999 has 16 divisors (see below), whose sum is σ = 93189888000. Its totient is φ = 77923248480.

The previous prime is 85384639987. The next prime is 85384640023. The reversal of 85384639999 is 99993648358.

It is a cyclic number.

It is not a de Polignac number, because 85384639999 - 2⁷ = 85384639871 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 (85384639919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65394 + ... + 418384.

It is an arithmetic number, because the mean of its divisors is an integer number (5824368000).

Almost surely, 2^85384639999 is an apocalyptic number.

85384639999 is a deficient number, since it is larger than the sum of its proper divisors (7805248001).

85384639999 is a wasteful number, since it uses less digits than its factorization.

85384639999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353478.

The product of its digits is 453496320, while the sum is 73.

The spelling of 85384639999 in words is "eighty-five billion, three hundred eighty-four million, six hundred thirty-nine thousand, nine hundred ninety-nine".