83855678843 has 4 divisors (see below), whose sum is σ = 83858742840. Its totient is φ = 83852614848.

The previous prime is 83855678833. The next prime is 83855678849. The reversal of 83855678843 is 34887655838.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83855678843 - 2¹⁰ = 83855677819 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 83855678843.

It is not an unprimeable number, because it can be changed into a prime (83855678849) 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, 1490573 + ... + 1545806.

It is an arithmetic number, because the mean of its divisors is an integer number (20964685710).

Almost surely, 2^83855678843 is an apocalyptic number.

83855678843 is a deficient number, since it is larger than the sum of its proper divisors (3063997).

83855678843 is a wasteful number, since it uses less digits than its factorization.

83855678843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063996.

The product of its digits is 154828800, while the sum is 65.

The spelling of 83855678843 in words is "eighty-three billion, eight hundred fifty-five million, six hundred seventy-eight thousand, eight hundred forty-three".