28556544193 has 2 divisors, whose sum is σ = 28556544194. Its totient is φ = 28556544192.

The previous prime is 28556544187. The next prime is 28556544221. The reversal of 28556544193 is 39144565582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20579910849 + 7976633344 = 143457^2 + 89312^2 .

It is a cyclic number.

It is not a de Polignac number, because 28556544193 - 2²¹ = 28554447041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28556544193.

It is not a weakly prime, because it can be changed into another prime (28556544143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278272096 + 14278272097.

It is an arithmetic number, because the mean of its divisors is an integer number (14278272097).

Almost surely, 2^28556544193 is an apocalyptic number.

It is an amenable number.

28556544193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28556544193 is an equidigital number, since it uses as much as digits as its factorization.

28556544193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184000, while the sum is 52.

The spelling of 28556544193 in words is "twenty-eight billion, five hundred fifty-six million, five hundred forty-four thousand, one hundred ninety-three".