285617028193 has 4 divisors (see below), whose sum is σ = 326419460800. Its totient is φ = 244814595588.

The previous prime is 285617028049. The next prime is 285617028233. The reversal of 285617028193 is 391820716582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 285617028193 - 2⁹ = 285617027681 is a prime.

It is the 534432-nd Hogben number.

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 285617028193.

It is not an unprimeable number, because it can be changed into a prime (285617028493) by changing a digit.

It is a nontrivial repunit in base 534431.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20401216293 + ... + 20401216306.

It is an arithmetic number, because the mean of its divisors is an integer number (81604865200).

Almost surely, 2^285617028193 is an apocalyptic number.

It is an amenable number.

285617028193 is a deficient number, since it is larger than the sum of its proper divisors (40802432607).

285617028193 is an equidigital number, since it uses as much as digits as its factorization.

285617028193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40802432606.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 285617028193 in words is "two hundred eighty-five billion, six hundred seventeen million, twenty-eight thousand, one hundred ninety-three".