28111216139 has 2 divisors, whose sum is σ = 28111216140. Its totient is φ = 28111216138.

The previous prime is 28111216117. The next prime is 28111216151. The reversal of 28111216139 is 93161211182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28111216139 - 2⁸ = 28111215883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28111216099 and 28111216108.

It is not a weakly prime, because it can be changed into another prime (24111216139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14055608069 + 14055608070.

It is an arithmetic number, because the mean of its divisors is an integer number (14055608070).

Almost surely, 2^28111216139 is an apocalyptic number.

28111216139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28111216139 is an equidigital number, since it uses as much as digits as its factorization.

28111216139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The spelling of 28111216139 in words is "twenty-eight billion, one hundred eleven million, two hundred sixteen thousand, one hundred thirty-nine".