27941481647 has 4 divisors (see below), whose sum is σ = 27947291880. Its totient is φ = 27935671416.

The previous prime is 27941481619. The next prime is 27941481649. The reversal of 27941481647 is 74618414972.

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 27941481647 - 2¹⁸ = 27941219503 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 (27941481649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2897897 + ... + 2907522.

It is an arithmetic number, because the mean of its divisors is an integer number (6986822970).

Almost surely, 2^27941481647 is an apocalyptic number.

27941481647 is a deficient number, since it is larger than the sum of its proper divisors (5810233).

27941481647 is an equidigital number, since it uses as much as digits as its factorization.

27941481647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5810232.

The product of its digits is 2709504, while the sum is 53.

The spelling of 27941481647 in words is "twenty-seven billion, nine hundred forty-one million, four hundred eighty-one thousand, six hundred forty-seven".