27768861011 has 2 divisors, whose sum is σ = 27768861012. Its totient is φ = 27768861010.

The previous prime is 27768860993. The next prime is 27768861047. The reversal of 27768861011 is 11016886772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27768861011 - 2⁶ = 27768860947 is a prime.

It is a super-2 number, since 2×27768861011² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27768861311) 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, 13884430505 + 13884430506.

It is an arithmetic number, because the mean of its divisors is an integer number (13884430506).

Almost surely, 2^27768861011 is an apocalyptic number.

27768861011 is a deficient number, since it is larger than the sum of its proper divisors (1).

27768861011 is an equidigital number, since it uses as much as digits as its factorization.

27768861011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 27768861011 in words is "twenty-seven billion, seven hundred sixty-eight million, eight hundred sixty-one thousand, eleven".