858434434858 has 64 divisors (see below), whose sum is σ = 1729056430080. Its totient is φ = 308695262400.

The previous prime is 858434434849. The next prime is 858434434867.

858434434858 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (858434434849) and next prime (858434434867).

It is a self number, because there is not a number n which added to its sum of digits gives 858434434858.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27393723 + ... + 27425041.

It is an arithmetic number, because the mean of its divisors is an integer number (27016506720).

Almost surely, 2^858434434858 is an apocalyptic number.

858434434858 is an abundant number, since it is smaller than the sum of its proper divisors (870621995222).

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

858434434858 is a wasteful number, since it uses less digits than its factorization.

858434434858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45043.

The product of its digits is 235929600, while the sum is 64.

The spelling of 858434434858 in words is "eight hundred fifty-eight billion, four hundred thirty-four million, four hundred thirty-four thousand, eight hundred fifty-eight".