28128356099 has 2 divisors, whose sum is σ = 28128356100. Its totient is φ = 28128356098.

The previous prime is 28128356083. The next prime is 28128356149. The reversal of 28128356099 is 99065382182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28128356099 - 2⁴ = 28128356083 is a prime.

It is a super-3 number, since 3×28128356099³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28128356099.

It is not a weakly prime, because it can be changed into another prime (28128356699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14064178049 + 14064178050.

It is an arithmetic number, because the mean of its divisors is an integer number (14064178050).

Almost surely, 2^28128356099 is an apocalyptic number.

28128356099 is a deficient number, since it is larger than the sum of its proper divisors (1).

28128356099 is an equidigital number, since it uses as much as digits as its factorization.

28128356099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 28128356099 in words is "twenty-eight billion, one hundred twenty-eight million, three hundred fifty-six thousand, ninety-nine".