28133197517 has 2 divisors, whose sum is σ = 28133197518. Its totient is φ = 28133197516.

The previous prime is 28133197481. The next prime is 28133197529. The reversal of 28133197517 is 71579133182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21031090441 + 7102107076 = 145021^2 + 84274^2 .

It is a cyclic number.

It is not a de Polignac number, because 28133197517 - 2¹⁰ = 28133196493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28133197577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14066598758 + 14066598759.

It is an arithmetic number, because the mean of its divisors is an integer number (14066598759).

Almost surely, 2^28133197517 is an apocalyptic number.

It is an amenable number.

28133197517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28133197517 is an equidigital number, since it uses as much as digits as its factorization.

28133197517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The spelling of 28133197517 in words is "twenty-eight billion, one hundred thirty-three million, one hundred ninety-seven thousand, five hundred seventeen".