27747520447 has 8 divisors (see below), whose sum is σ = 29480889600. Its totient is φ = 26041448664.

The previous prime is 27747520441. The next prime is 27747520457. The reversal of 27747520447 is 74402574772.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27747520447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27747520447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27747520441) 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, 6822247 + ... + 6826312.

It is an arithmetic number, because the mean of its divisors is an integer number (3685111200).

Almost surely, 2^27747520447 is an apocalyptic number.

27747520447 is a deficient number, since it is larger than the sum of its proper divisors (1733369153).

27747520447 is a wasteful number, since it uses less digits than its factorization.

27747520447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13648685.

The product of its (nonzero) digits is 3073280, while the sum is 49.

The spelling of 27747520447 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred twenty thousand, four hundred forty-seven".