28155548203 has 2 divisors, whose sum is σ = 28155548204. Its totient is φ = 28155548202.

The previous prime is 28155548173. The next prime is 28155548237. The reversal of 28155548203 is 30284555182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28155548203 - 2²⁹ = 27618677291 is a prime.

It is a super-2 number, since 2×28155548203² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28155548203.

It is not a weakly prime, because it can be changed into another prime (28155548263) 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, 14077774101 + 14077774102.

It is an arithmetic number, because the mean of its divisors is an integer number (14077774102).

Almost surely, 2^28155548203 is an apocalyptic number.

28155548203 is a deficient number, since it is larger than the sum of its proper divisors (1).

28155548203 is an equidigital number, since it uses as much as digits as its factorization.

28155548203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384000, while the sum is 43.

The spelling of 28155548203 in words is "twenty-eight billion, one hundred fifty-five million, five hundred forty-eight thousand, two hundred three".