27768573013 has 2 divisors, whose sum is σ = 27768573014. Its totient is φ = 27768573012.

The previous prime is 27768573011. The next prime is 27768573037. The reversal of 27768573013 is 31037586772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26329281169 + 1439291844 = 162263^2 + 37938^2 .

It is a cyclic number.

It is not a de Polignac number, because 27768573013 - 2¹ = 27768573011 is a prime.

Together with 27768573011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27768573011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13884286506 + 13884286507.

It is an arithmetic number, because the mean of its divisors is an integer number (13884286507).

Almost surely, 2^27768573013 is an apocalyptic number.

It is an amenable number.

27768573013 is a deficient number, since it is larger than the sum of its proper divisors (1).

27768573013 is an equidigital number, since it uses as much as digits as its factorization.

27768573013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 27768573013 in words is "twenty-seven billion, seven hundred sixty-eight million, five hundred seventy-three thousand, thirteen".