28285267513 has 2 divisors, whose sum is σ = 28285267514. Its totient is φ = 28285267512.

The previous prime is 28285267511. The next prime is 28285267531. The reversal of 28285267513 is 31576258282.

Together with next prime (28285267531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23727397369 + 4557870144 = 154037^2 + 67512^2 .

It is a cyclic number.

It is not a de Polignac number, because 28285267513 - 2¹ = 28285267511 is a prime.

Together with 28285267511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28285267511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142633756 + 14142633757.

It is an arithmetic number, because the mean of its divisors is an integer number (14142633757).

Almost surely, 2^28285267513 is an apocalyptic number.

It is an amenable number.

28285267513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285267513 is an equidigital number, since it uses as much as digits as its factorization.

28285267513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 49.

The spelling of 28285267513 in words is "twenty-eight billion, two hundred eighty-five million, two hundred sixty-seven thousand, five hundred thirteen".