27768728227 has 2 divisors, whose sum is σ = 27768728228. Its totient is φ = 27768728226.

The previous prime is 27768728213. The next prime is 27768728261. The reversal of 27768728227 is 72282786772.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27768728227 - 2¹⁵ = 27768695459 is a prime.

It is a super-2 number, since 2×27768728227² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27768728027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13884364113 + 13884364114.

It is an arithmetic number, because the mean of its divisors is an integer number (13884364114).

Almost surely, 2^27768728227 is an apocalyptic number.

27768728227 is a deficient number, since it is larger than the sum of its proper divisors (1).

27768728227 is an equidigital number, since it uses as much as digits as its factorization.

27768728227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14751744, while the sum is 58.

The spelling of 27768728227 in words is "twenty-seven billion, seven hundred sixty-eight million, seven hundred twenty-eight thousand, two hundred twenty-seven".