858863368859 has 4 divisors (see below), whose sum is σ = 862456939680. Its totient is φ = 855269798040.

The previous prime is 858863368849. The next prime is 858863368861. The reversal of 858863368859 is 958863368858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958863368858 = 2 ⋅479431684429.

It is a cyclic number.

It is not a de Polignac number, because 858863368859 - 2²⁴ = 858846591643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 858863368859.

It is not an unprimeable number, because it can be changed into a prime (858863368849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796785052 + ... + 1796785529.

It is an arithmetic number, because the mean of its divisors is an integer number (215614234920).

Almost surely, 2^858863368859 is an apocalyptic number.

858863368859 is a deficient number, since it is larger than the sum of its proper divisors (3593570821).

858863368859 is a wasteful number, since it uses less digits than its factorization.

858863368859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593570820.

The product of its digits is 2388787200, while the sum is 77.

Subtracting 858863368859 from its reverse (958863368858), we obtain a palindrome (99999999999).

The spelling of 858863368859 in words is "eight hundred fifty-eight billion, eight hundred sixty-three million, three hundred sixty-eight thousand, eight hundred fifty-nine".