858857332452 has 144 divisors (see below), whose sum is σ = 2461761687168. Its totient is φ = 227504471040.

The previous prime is 858857332451. The next prime is 858857332457. The reversal of 858857332452 is 254233758858.

It is not an unprimeable number, because it can be changed into a prime (858857332451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6343302 + ... + 6477282.

It is an arithmetic number, because the mean of its divisors is an integer number (17095567272).

Almost surely, 2^858857332452 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 858857332452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230880843584).

858857332452 is an abundant number, since it is smaller than the sum of its proper divisors (1602904354716).

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

858857332452 is a wasteful number, since it uses less digits than its factorization.

858857332452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134146 (or 134077 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 60.

The spelling of 858857332452 in words is "eight hundred fifty-eight billion, eight hundred fifty-seven million, three hundred thirty-two thousand, four hundred fifty-two".