28344053509 has 2 divisors, whose sum is σ = 28344053510. Its totient is φ = 28344053508.

The previous prime is 28344053483. The next prime is 28344053609. The reversal of 28344053509 is 90535044382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14619228100 + 13724825409 = 120910^2 + 117153^2 .

It is a cyclic number.

It is not a de Polignac number, because 28344053509 - 2¹⁵ = 28344020741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28344053609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14172026754 + 14172026755.

It is an arithmetic number, because the mean of its divisors is an integer number (14172026755).

Almost surely, 2^28344053509 is an apocalyptic number.

It is an amenable number.

28344053509 is a deficient number, since it is larger than the sum of its proper divisors (1).

28344053509 is an equidigital number, since it uses as much as digits as its factorization.

28344053509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 28344053509 in words is "twenty-eight billion, three hundred forty-four million, fifty-three thousand, five hundred nine".