858555555858 has 192 divisors, whose sum is σ = 2522350381824. Its totient is φ = 203808960000.

The previous prime is 858555555839. The next prime is 858555555859.

858555555858 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (858555555859) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1583928 + ... + 2055708.

It is an arithmetic number, because the mean of its divisors is an integer number (13137241572).

Almost surely, 2^858555555858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858555555858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261175190912).

858555555858 is an abundant number, since it is smaller than the sum of its proper divisors (1663794825966).

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

858555555858 is a wasteful number, since it uses less digits than its factorization.

858555555858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471921 (or 471918 counting only the distinct ones).

The product of its digits is 1600000000, while the sum is 72.

The spelling of 858555555858 in words is "eight hundred fifty-eight billion, five hundred fifty-five million, five hundred fifty-five thousand, eight hundred fifty-eight".