27800185305 has 16 divisors (see below), whose sum is σ = 44819843904. Its totient is φ = 14713583040.

The previous prime is 27800185297. The next prime is 27800185327. The reversal of 27800185305 is 50358100872.

It is not a de Polignac number, because 27800185305 - 2³ = 27800185297 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7071874 + ... + 7075803.

It is an arithmetic number, because the mean of its divisors is an integer number (2801240244).

Almost surely, 2^27800185305 is an apocalyptic number.

It is an amenable number.

27800185305 is a deficient number, since it is larger than the sum of its proper divisors (17019658599).

27800185305 is a wasteful number, since it uses less digits than its factorization.

27800185305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14147816.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 27800185305 in words is "twenty-seven billion, eight hundred million, one hundred eighty-five thousand, three hundred five".