6854009845 has 4 divisors (see below), whose sum is σ = 8224811820. Its totient is φ = 5483207872.

The previous prime is 6854009839. The next prime is 6854009857. The reversal of 6854009845 is 5489004586.

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 4166831601 + 2687178244 = 64551^2 + 51838^2 .

It is a cyclic number.

It is not a de Polignac number, because 6854009845 - 2⁹ = 6854009333 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685400980 + ... + 685400989.

It is an arithmetic number, because the mean of its divisors is an integer number (2056202955).

Almost surely, 2^6854009845 is an apocalyptic number.

It is an amenable number.

6854009845 is a deficient number, since it is larger than the sum of its proper divisors (1370801975).

6854009845 is a wasteful number, since it uses less digits than its factorization.

6854009845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370801974.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The square root of 6854009845 is about 82788.9476017179. The cubic root of 6854009845 is about 1899.5391167444.

The spelling of 6854009845 in words is "six billion, eight hundred fifty-four million, nine thousand, eight hundred forty-five".