27505089673 has 4 divisors (see below), whose sum is σ = 27505421460. Its totient is φ = 27504757888.

The previous prime is 27505089671. The next prime is 27505089679. The reversal of 27505089673 is 37698050572.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10235975929 + 17269113744 = 101173^2 + 131412^2 .

It is a cyclic number.

It is not a de Polignac number, because 27505089673 - 2¹ = 27505089671 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 27505089673.

It is not an unprimeable number, because it can be changed into a prime (27505089671) 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, 77061 + ... + 246877.

It is an arithmetic number, because the mean of its divisors is an integer number (6876355365).

Almost surely, 2^27505089673 is an apocalyptic number.

It is an amenable number.

27505089673 is a deficient number, since it is larger than the sum of its proper divisors (331787).

27505089673 is a wasteful number, since it uses less digits than its factorization.

27505089673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331786.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 27505089673 in words is "twenty-seven billion, five hundred five million, eighty-nine thousand, six hundred seventy-three".