27798131199 has 4 divisors (see below), whose sum is σ = 37064174936. Its totient is φ = 18532087464.

The previous prime is 27798131183. The next prime is 27798131201. The reversal of 27798131199 is 99113189772.

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

It is not a de Polignac number, because 27798131199 - 2⁴ = 27798131183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27798131129) by changing a digit.

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, 4633021864 + ... + 4633021869.

It is an arithmetic number, because the mean of its divisors is an integer number (9266043734).

Almost surely, 2^27798131199 is an apocalyptic number.

27798131199 is a deficient number, since it is larger than the sum of its proper divisors (9266043737).

27798131199 is an equidigital number, since it uses as much as digits as its factorization.

27798131199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9266043736.

The product of its digits is 1714608, while the sum is 57.

The spelling of 27798131199 in words is "twenty-seven billion, seven hundred ninety-eight million, one hundred thirty-one thousand, one hundred ninety-nine".