28318514513 has 2 divisors, whose sum is σ = 28318514514. Its totient is φ = 28318514512.

The previous prime is 28318514491. The next prime is 28318514531. The reversal of 28318514513 is 31541581382.

It is a happy number.

Together with next prime (28318514531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25508242369 + 2810272144 = 159713^2 + 53012^2 .

It is a cyclic number.

It is not a de Polignac number, because 28318514513 - 2⁶ = 28318514449 is a prime.

It is not a weakly prime, because it can be changed into another prime (28318514533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159257256 + 14159257257.

It is an arithmetic number, because the mean of its divisors is an integer number (14159257257).

Almost surely, 2^28318514513 is an apocalyptic number.

It is an amenable number.

28318514513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28318514513 is an equidigital number, since it uses as much as digits as its factorization.

28318514513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 41.

The spelling of 28318514513 in words is "twenty-eight billion, three hundred eighteen million, five hundred fourteen thousand, five hundred thirteen".