28254849193 has 2 divisors, whose sum is σ = 28254849194. Its totient is φ = 28254849192.

The previous prime is 28254849173. The next prime is 28254849199. The reversal of 28254849193 is 39194845282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26489841049 + 1765008144 = 162757^2 + 42012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28254849193 is a prime.

It is not a weakly prime, because it can be changed into another prime (28254849199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14127424596 + 14127424597.

It is an arithmetic number, because the mean of its divisors is an integer number (14127424597).

Almost surely, 2^28254849193 is an apocalyptic number.

It is an amenable number.

28254849193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28254849193 is an equidigital number, since it uses as much as digits as its factorization.

28254849193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 55.

The spelling of 28254849193 in words is "twenty-eight billion, two hundred fifty-four million, eight hundred forty-nine thousand, one hundred ninety-three".