6842491405 has 4 divisors (see below), whose sum is σ = 8210989692. Its totient is φ = 5473993120.

The previous prime is 6842491367. The next prime is 6842491417. The reversal of 6842491405 is 5041942486.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1723661289 + 5118830116 = 41517^2 + 71546^2 .

It is not a de Polignac number, because 6842491405 - 2¹⁹ = 6841967117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684249136 + ... + 684249145.

It is an arithmetic number, because the mean of its divisors is an integer number (2052747423).

Almost surely, 2^6842491405 is an apocalyptic number.

It is an amenable number.

6842491405 is a deficient number, since it is larger than the sum of its proper divisors (1368498287).

6842491405 is a wasteful number, since it uses less digits than its factorization.

6842491405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368498286.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 6842491405 is about 82719.3532675395. The cubic root of 6842491405 is about 1898.4744360741.

The spelling of 6842491405 in words is "six billion, eight hundred forty-two million, four hundred ninety-one thousand, four hundred five".