85452228840 has 128 divisors (see below), whose sum is σ = 279828950400. Its totient is φ = 20703313920.

The previous prime is 85452228817. The next prime is 85452228847. The reversal of 85452228840 is 4882225458.

It is a self number, because there is not a number n which added to its sum of digits gives 85452228840.

It is not an unprimeable number, because it can be changed into a prime (85452228847) 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, 2295496 + ... + 2332424.

It is an arithmetic number, because the mean of its divisors is an integer number (2186163675).

Almost surely, 2^85452228840 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 85452228840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139914475200).

85452228840 is an abundant number, since it is smaller than the sum of its proper divisors (194376721560).

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

85452228840 is a wasteful number, since it uses less digits than its factorization.

85452228840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38707 (or 38703 counting only the distinct ones).

The product of its (nonzero) digits is 1638400, while the sum is 48.

The spelling of 85452228840 in words is "eighty-five billion, four hundred fifty-two million, two hundred twenty-eight thousand, eight hundred forty".