28217774099 has 2 divisors, whose sum is σ = 28217774100. Its totient is φ = 28217774098.

The previous prime is 28217774083. The next prime is 28217774119. The reversal of 28217774099 is 99047771282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28217774099 - 2⁴ = 28217774083 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28217774699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14108887049 + 14108887050.

It is an arithmetic number, because the mean of its divisors is an integer number (14108887050).

Almost surely, 2^28217774099 is an apocalyptic number.

28217774099 is a deficient number, since it is larger than the sum of its proper divisors (1).

28217774099 is an equidigital number, since it uses as much as digits as its factorization.

28217774099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 28217774099 in words is "twenty-eight billion, two hundred seventeen million, seven hundred seventy-four thousand, ninety-nine".