27966938489491 has 2 divisors, whose sum is σ = 27966938489492. Its totient is φ = 27966938489490.

The previous prime is 27966938489473. The next prime is 27966938489509. The reversal of 27966938489491 is 19498483966972.

It is a balanced prime because it is at equal distance from previous prime (27966938489473) and next prime (27966938489509).

It is a cyclic number.

It is not a de Polignac number, because 27966938489491 - 2⁷ = 27966938489363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27966938489399 and 27966938489408.

It is not a weakly prime, because it can be changed into another prime (27966938487491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13983469244745 + 13983469244746.

It is an arithmetic number, because the mean of its divisors is an integer number (13983469244746).

Almost surely, 2^{27966938489491} is an apocalyptic number.

27966938489491 is a deficient number, since it is larger than the sum of its proper divisors (1).

27966938489491 is an equidigital number, since it uses as much as digits as its factorization.

27966938489491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10158317568, while the sum is 85.

The spelling of 27966938489491 in words is "twenty-seven trillion, nine hundred sixty-six billion, nine hundred thirty-eight million, four hundred eighty-nine thousand, four hundred ninety-one".