28773733249 has 2 divisors, whose sum is σ = 28773733250. Its totient is φ = 28773733248.

The previous prime is 28773733229. The next prime is 28773733291. The reversal of 28773733249 is 94233737782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28066971024 + 706762225 = 167532^2 + 26585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28773733249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28773733249.

It is not a weakly prime, because it can be changed into another prime (28773733229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14386866624 + 14386866625.

It is an arithmetic number, because the mean of its divisors is an integer number (14386866625).

Almost surely, 2^28773733249 is an apocalyptic number.

It is an amenable number.

28773733249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28773733249 is an equidigital number, since it uses as much as digits as its factorization.

28773733249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 55.

The spelling of 28773733249 in words is "twenty-eight billion, seven hundred seventy-three million, seven hundred thirty-three thousand, two hundred forty-nine".