85847318440 has 128 divisors (see below), whose sum is σ = 216276480000. Its totient is φ = 30449599488.

The previous prime is 85847318407. The next prime is 85847318441. The reversal of 85847318440 is 4481374858.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (85847318441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2986617 + ... + 3015223.

It is an arithmetic number, because the mean of its divisors is an integer number (1689660000).

Almost surely, 2^85847318440 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 85847318440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108138240000).

85847318440 is an abundant number, since it is smaller than the sum of its proper divisors (130429161560).

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

85847318440 is a wasteful number, since it uses less digits than its factorization.

85847318440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28859 (or 28855 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 52.

The spelling of 85847318440 in words is "eighty-five billion, eight hundred forty-seven million, three hundred eighteen thousand, four hundred forty".