27966938489473 has 2 divisors, whose sum is σ = 27966938489474. Its totient is φ = 27966938489472.

The previous prime is 27966938489467. The next prime is 27966938489491. The reversal of 27966938489473 is 37498483966972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21907941470464 + 6058997019009 = 4680592^2 + 2461503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27966938489473 is a prime.

It is not a weakly prime, because it can be changed into another prime (27966938481473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13983469244736 + 13983469244737.

It is an arithmetic number, because the mean of its divisors is an integer number (13983469244737).

Almost surely, 2^{27966938489473} is an apocalyptic number.

It is an amenable number.

27966938489473 is a deficient number, since it is larger than the sum of its proper divisors (1).

27966938489473 is an equidigital number, since it uses as much as digits as its factorization.

27966938489473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23702740992, while the sum is 85.

The spelling of 27966938489473 in words is "twenty-seven trillion, nine hundred sixty-six billion, nine hundred thirty-eight million, four hundred eighty-nine thousand, four hundred seventy-three".