27711745205 has 8 divisors (see below), whose sum is σ = 33799243704. Its totient is φ = 21805963200.

The previous prime is 27711745181. The next prime is 27711745207. The reversal of 27711745205 is 50254711772.

It can be written as a sum of positive squares in 4 ways, for example, as 359216209 + 27352528996 = 18953^2 + 165386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-27711745205 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 (27711745207) 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 7 ways as a sum of consecutive naturals, for example, 45428786 + ... + 45429395.

It is an arithmetic number, because the mean of its divisors is an integer number (4224905463).

Almost surely, 2^27711745205 is an apocalyptic number.

It is an amenable number.

27711745205 is a deficient number, since it is larger than the sum of its proper divisors (6087498499).

27711745205 is an equidigital number, since it uses as much as digits as its factorization.

27711745205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90858247.

The product of its (nonzero) digits is 137200, while the sum is 41.

The spelling of 27711745205 in words is "twenty-seven billion, seven hundred eleven million, seven hundred forty-five thousand, two hundred five".