28667558111 has 2 divisors, whose sum is σ = 28667558112. Its totient is φ = 28667558110.

The previous prime is 28667558107. The next prime is 28667558149. The reversal of 28667558111 is 11185576682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28667558111 - 2² = 28667558107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28667558111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28667558191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333779055 + 14333779056.

It is an arithmetic number, because the mean of its divisors is an integer number (14333779056).

Almost surely, 2^28667558111 is an apocalyptic number.

28667558111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28667558111 is an equidigital number, since it uses as much as digits as its factorization.

28667558111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 50.

The spelling of 28667558111 in words is "twenty-eight billion, six hundred sixty-seven million, five hundred fifty-eight thousand, one hundred eleven".