28668781711 has 2 divisors, whose sum is σ = 28668781712. Its totient is φ = 28668781710.

The previous prime is 28668781703. The next prime is 28668781717. The reversal of 28668781711 is 11718786682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28668781711 - 2³ = 28668781703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28668781717) 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, 14334390855 + 14334390856.

It is an arithmetic number, because the mean of its divisors is an integer number (14334390856).

Almost surely, 2^28668781711 is an apocalyptic number.

28668781711 is a deficient number, since it is larger than the sum of its proper divisors (1).

28668781711 is an equidigital number, since it uses as much as digits as its factorization.

28668781711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 55.

The spelling of 28668781711 in words is "twenty-eight billion, six hundred sixty-eight million, seven hundred eighty-one thousand, seven hundred eleven".