27830007805 has 4 divisors (see below), whose sum is σ = 33396009372. Its totient is φ = 22264006240.

The previous prime is 27830007761. The next prime is 27830007823. The reversal of 27830007805 is 50870003872.

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 13263207556 + 14566800249 = 115166^2 + 120693^2 .

It is not a de Polignac number, because 27830007805 - 2¹¹ = 27830005757 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2783000776 + ... + 2783000785.

It is an arithmetic number, because the mean of its divisors is an integer number (8349002343).

Almost surely, 2^27830007805 is an apocalyptic number.

It is an amenable number.

27830007805 is a deficient number, since it is larger than the sum of its proper divisors (5566001567).

27830007805 is an equidigital number, since it uses as much as digits as its factorization.

27830007805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566001566.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 27830007805 in words is "twenty-seven billion, eight hundred thirty million, seven thousand, eight hundred five".