216188878111 has 2 divisors, whose sum is σ = 216188878112. Its totient is φ = 216188878110.

The previous prime is 216188878099. The next prime is 216188878123. The reversal of 216188878111 is 111878881612.

It is a balanced prime because it is at equal distance from previous prime (216188878099) and next prime (216188878123).

It is a cyclic number.

It is not a de Polignac number, because 216188878111 - 2³⁷ = 78749924639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216182878111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108094439055 + 108094439056.

It is an arithmetic number, because the mean of its divisors is an integer number (108094439056).

Almost surely, 2^216188878111 is an apocalyptic number.

216188878111 is a deficient number, since it is larger than the sum of its proper divisors (1).

216188878111 is an equidigital number, since it uses as much as digits as its factorization.

216188878111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 52.

The spelling of 216188878111 in words is "two hundred sixteen billion, one hundred eighty-eight million, eight hundred seventy-eight thousand, one hundred eleven".