28509115337 has 2 divisors, whose sum is σ = 28509115338. Its totient is φ = 28509115336.

The previous prime is 28509115333. The next prime is 28509115343. The reversal of 28509115337 is 73351190582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28411125136 + 97990201 = 168556^2 + 9899^2 .

It is a cyclic number.

It is not a de Polignac number, because 28509115337 - 2² = 28509115333 is a prime.

It is not a weakly prime, because it can be changed into another prime (28509115333) 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, 14254557668 + 14254557669.

It is an arithmetic number, because the mean of its divisors is an integer number (14254557669).

Almost surely, 2^28509115337 is an apocalyptic number.

It is an amenable number.

28509115337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28509115337 is an equidigital number, since it uses as much as digits as its factorization.

28509115337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 28509115337 in words is "twenty-eight billion, five hundred nine million, one hundred fifteen thousand, three hundred thirty-seven".