27744481809 has 12 divisors (see below), whose sum is σ = 43718577552. Its totient is φ = 16814837400.

The previous prime is 27744481753. The next prime is 27744481819. The reversal of 27744481809 is 90818444772.

It is not a de Polignac number, because 27744481809 - 2⁸ = 27744481553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27744481819) 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 11 ways as a sum of consecutive naturals, for example, 140123547 + ... + 140123744.

It is an arithmetic number, because the mean of its divisors is an integer number (3643214796).

Almost surely, 2^27744481809 is an apocalyptic number.

It is an amenable number.

27744481809 is a deficient number, since it is larger than the sum of its proper divisors (15974095743).

27744481809 is a wasteful number, since it uses less digits than its factorization.

27744481809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280247308 (or 280247305 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 27744481809 in words is "twenty-seven billion, seven hundred forty-four million, four hundred eighty-one thousand, eight hundred nine".