857209522858 has 32 divisors (see below), whose sum is σ = 1425625286400. Its totient is φ = 384045805440.

The previous prime is 857209522847. The next prime is 857209522907. The reversal of 857209522858 is 858225902758.

It is a happy number.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 857209522796 and 857209522805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1808310 + ... + 2232577.

It is an arithmetic number, because the mean of its divisors is an integer number (44550790200).

Almost surely, 2^857209522858 is an apocalyptic number.

857209522858 is a deficient number, since it is larger than the sum of its proper divisors (568415763542).

857209522858 is a wasteful number, since it uses less digits than its factorization.

857209522858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041142.

The product of its (nonzero) digits is 32256000, while the sum is 61.

The spelling of 857209522858 in words is "eight hundred fifty-seven billion, two hundred nine million, five hundred twenty-two thousand, eight hundred fifty-eight".