27688727809 has 8 divisors (see below), whose sum is σ = 27763737120. Its totient is φ = 27613754976.

The previous prime is 27688727783. The next prime is 27688727819. The reversal of 27688727809 is 90872788672.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27688727809 - 2¹⁷ = 27688596737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27688727819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2236374 + ... + 2248720.

It is an arithmetic number, because the mean of its divisors is an integer number (3470467140).

Almost surely, 2^27688727809 is an apocalyptic number.

It is an amenable number.

27688727809 is a deficient number, since it is larger than the sum of its proper divisors (75009311).

27688727809 is a wasteful number, since it uses less digits than its factorization.

27688727809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18239.

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 27688727809 in words is "twenty-seven billion, six hundred eighty-eight million, seven hundred twenty-seven thousand, eight hundred nine".