85216899944 has 64 divisors (see below), whose sum is σ = 177274656000. Its totient is φ = 38079774720.

The previous prime is 85216899941. The next prime is 85216899949. The reversal of 85216899944 is 44999861258.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85216899941) 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, 1593512 + ... + 1646120.

It is an arithmetic number, because the mean of its divisors is an integer number (2769916500).

Almost surely, 2^85216899944 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 85216899944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88637328000).

85216899944 is an abundant number, since it is smaller than the sum of its proper divisors (92057756056).

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

85216899944 is a wasteful number, since it uses less digits than its factorization.

85216899944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52938 (or 52934 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 65.

The spelling of 85216899944 in words is "eighty-five billion, two hundred sixteen million, eight hundred ninety-nine thousand, nine hundred forty-four".