27827405687 has 4 divisors (see below), whose sum is σ = 28114286256. Its totient is φ = 27540525120.

The previous prime is 27827405663. The next prime is 27827405699. The reversal of 27827405687 is 78650472872.

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 27827405687 - 2¹⁸ = 27827143543 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 (27827405647) 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, 143440139 + ... + 143440332.

It is an arithmetic number, because the mean of its divisors is an integer number (7028571564).

Almost surely, 2^27827405687 is an apocalyptic number.

27827405687 is a deficient number, since it is larger than the sum of its proper divisors (286880569).

27827405687 is an equidigital number, since it uses as much as digits as its factorization.

27827405687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286880568.

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 27827405687 in words is "twenty-seven billion, eight hundred twenty-seven million, four hundred five thousand, six hundred eighty-seven".