27726681785 has 16 divisors (see below), whose sum is σ = 36301502592. Its totient is φ = 20162217600.

The previous prime is 27726681761. The next prime is 27726681791. The reversal of 27726681785 is 58718662772.

It is not a de Polignac number, because 27726681785 - 2⁶ = 27726681721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 455765 + ... + 513005.

It is an arithmetic number, because the mean of its divisors is an integer number (2268843912).

Almost surely, 2^27726681785 is an apocalyptic number.

It is an amenable number.

27726681785 is a deficient number, since it is larger than the sum of its proper divisors (8574820807).

27726681785 is a wasteful number, since it uses less digits than its factorization.

27726681785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66064.

The product of its digits is 15805440, while the sum is 59.

The spelling of 27726681785 in words is "twenty-seven billion, seven hundred twenty-six million, six hundred eighty-one thousand, seven hundred eighty-five".