27705250673 has 2 divisors, whose sum is σ = 27705250674. Its totient is φ = 27705250672.

The previous prime is 27705250663. The next prime is 27705250679. The reversal of 27705250673 is 37605250772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18263630449 + 9441620224 = 135143^2 + 97168^2 .

It is a cyclic number.

It is not a de Polignac number, because 27705250673 - 2¹⁴ = 27705234289 is a prime.

It is not a weakly prime, because it can be changed into another prime (27705250679) 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 as a sum of consecutive naturals, namely, 13852625336 + 13852625337.

It is an arithmetic number, because the mean of its divisors is an integer number (13852625337).

Almost surely, 2^27705250673 is an apocalyptic number.

It is an amenable number.

27705250673 is a deficient number, since it is larger than the sum of its proper divisors (1).

27705250673 is an equidigital number, since it uses as much as digits as its factorization.

27705250673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617400, while the sum is 44.

Subtracting 27705250673 from its reverse (37605250772), we obtain a palindrome (9900000099).

The spelling of 27705250673 in words is "twenty-seven billion, seven hundred five million, two hundred fifty thousand, six hundred seventy-three".