27727064785 has 24 divisors (see below), whose sum is σ = 38718305640. Its totient is φ = 19006170624.

The previous prime is 27727064779. The next prime is 27727064789. The reversal of 27727064785 is 58746072772.

It can be written as a sum of positive squares in 4 ways, for example, as 6296739904 + 21430324881 = 79352^2 + 146391^2 .

It is not a de Polignac number, because 27727064785 - 2¹⁵ = 27727032017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27727064789) 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 23 ways as a sum of consecutive naturals, for example, 738487 + ... + 775123.

It is an arithmetic number, because the mean of its divisors is an integer number (1613262735).

Almost surely, 2^27727064785 is an apocalyptic number.

It is an amenable number.

27727064785 is a deficient number, since it is larger than the sum of its proper divisors (10991240855).

27727064785 is a wasteful number, since it uses less digits than its factorization.

27727064785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39745 (or 39738 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 27727064785 in words is "twenty-seven billion, seven hundred twenty-seven million, sixty-four thousand, seven hundred eighty-five".