858855558858 has 32 divisors (see below), whose sum is σ = 1886276408832. Its totient is φ = 258535686000.

The previous prime is 858855558853. The next prime is 858855558877.

858855558858 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (858855558853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43079316 + ... + 43099247.

It is an arithmetic number, because the mean of its divisors is an integer number (58946137776).

Almost surely, 2^858855558858 is an apocalyptic number.

858855558858 is an abundant number, since it is smaller than the sum of its proper divisors (1027420849974).

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

858855558858 is a wasteful number, since it uses less digits than its factorization.

858855558858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86178730.

The product of its digits is 4096000000, while the sum is 78.

The spelling of 858855558858 in words is "eight hundred fifty-eight billion, eight hundred fifty-five million, five hundred fifty-eight thousand, eight hundred fifty-eight".