27643545107 has 4 divisors (see below), whose sum is σ = 27652579056. Its totient is φ = 27634511160.

The previous prime is 27643545071. The next prime is 27643545133. The reversal of 27643545107 is 70154534672.

It is a happy number.

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 27643545107 - 2¹⁸ = 27643282963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27643505107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4512383 + ... + 4518504.

It is an arithmetic number, because the mean of its divisors is an integer number (6913144764).

Almost surely, 2^27643545107 is an apocalyptic number.

27643545107 is a deficient number, since it is larger than the sum of its proper divisors (9033949).

27643545107 is an equidigital number, since it uses as much as digits as its factorization.

27643545107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9033948.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 27643545107 in words is "twenty-seven billion, six hundred forty-three million, five hundred forty-five thousand, one hundred seven".