27720586847 has 2 divisors, whose sum is σ = 27720586848. Its totient is φ = 27720586846.

The previous prime is 27720586669. The next prime is 27720586853. The reversal of 27720586847 is 74868502772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27720586847 - 2¹⁸ = 27720324703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27720586792 and 27720586801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27720586867) 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, 13860293423 + 13860293424.

It is an arithmetic number, because the mean of its divisors is an integer number (13860293424).

Almost surely, 2^27720586847 is an apocalyptic number.

27720586847 is a deficient number, since it is larger than the sum of its proper divisors (1).

27720586847 is an equidigital number, since it uses as much as digits as its factorization.

27720586847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 27720586847 in words is "twenty-seven billion, seven hundred twenty million, five hundred eighty-six thousand, eight hundred forty-seven".