28161108203 has 2 divisors, whose sum is σ = 28161108204. Its totient is φ = 28161108202.

The previous prime is 28161108197. The next prime is 28161108223. The reversal of 28161108203 is 30280116182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28161108203 - 2²⁴ = 28144330987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28161108203.

It is not a weakly prime, because it can be changed into another prime (28161108223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14080554101 + 14080554102.

It is an arithmetic number, because the mean of its divisors is an integer number (14080554102).

Almost surely, 2^28161108203 is an apocalyptic number.

28161108203 is a deficient number, since it is larger than the sum of its proper divisors (1).

28161108203 is an equidigital number, since it uses as much as digits as its factorization.

28161108203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 28161108203 in words is "twenty-eight billion, one hundred sixty-one million, one hundred eight thousand, two hundred three".