85399824944 has 80 divisors (see below), whose sum is σ = 193442380800. Its totient is φ = 35761969152.

The previous prime is 85399824911. The next prime is 85399824971. The reversal of 85399824944 is 44942899358.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3245312 + ... + 3271520.

It is an arithmetic number, because the mean of its divisors is an integer number (2418029760).

Almost surely, 2^85399824944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85399824944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96721190400).

85399824944 is an abundant number, since it is smaller than the sum of its proper divisors (108042555856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85399824944 is a wasteful number, since it uses less digits than its factorization.

85399824944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26890 (or 26884 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 65.

The spelling of 85399824944 in words is "eighty-five billion, three hundred ninety-nine million, eight hundred twenty-four thousand, nine hundred forty-four".