28118119693 has 2 divisors, whose sum is σ = 28118119694. Its totient is φ = 28118119692.

The previous prime is 28118119669. The next prime is 28118119739. The reversal of 28118119693 is 39691181182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18451690569 + 9666429124 = 135837^2 + 98318^2 .

It is a cyclic number.

It is not a de Polignac number, because 28118119693 - 2⁹ = 28118119181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28118116693) 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, 14059059846 + 14059059847.

It is an arithmetic number, because the mean of its divisors is an integer number (14059059847).

Almost surely, 2^28118119693 is an apocalyptic number.

It is an amenable number.

28118119693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28118119693 is an equidigital number, since it uses as much as digits as its factorization.

28118119693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 49.

The spelling of 28118119693 in words is "twenty-eight billion, one hundred eighteen million, one hundred nineteen thousand, six hundred ninety-three".