27913916647 has 4 divisors (see below), whose sum is σ = 27963497880. Its totient is φ = 27864335416.

The previous prime is 27913916609. The next prime is 27913916659. The reversal of 27913916647 is 74661931972.

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

It is a cyclic number.

It is not a de Polignac number, because 27913916647 - 2¹¹ = 27913914599 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 (27913916677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24789772 + ... + 24790897.

It is an arithmetic number, because the mean of its divisors is an integer number (6990874470).

Almost surely, 2^27913916647 is an apocalyptic number.

27913916647 is a deficient number, since it is larger than the sum of its proper divisors (49581233).

27913916647 is an equidigital number, since it uses as much as digits as its factorization.

27913916647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49581232.

The product of its digits is 3429216, while the sum is 55.

The spelling of 27913916647 in words is "twenty-seven billion, nine hundred thirteen million, nine hundred sixteen thousand, six hundred forty-seven".