858597795858 has 64 divisors (see below), whose sum is σ = 1928146555008. Its totient is φ = 252594961920.

The previous prime is 858597795857. The next prime is 858597795941.

858597795858 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (858597795857) 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, 731316 + ... + 1500672.

It is an arithmetic number, because the mean of its divisors is an integer number (30127289922).

Almost surely, 2^858597795858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858597795858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964073277504).

858597795858 is an abundant number, since it is smaller than the sum of its proper divisors (1069548759150).

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

858597795858 is a wasteful number, since it uses less digits than its factorization.

858597795858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769867.

The product of its digits is 10160640000, while the sum is 84.

The spelling of 858597795858 in words is "eight hundred fifty-eight billion, five hundred ninety-seven million, seven hundred ninety-five thousand, eight hundred fifty-eight".