28135360321 has 2 divisors, whose sum is σ = 28135360322. Its totient is φ = 28135360320.

The previous prime is 28135360283. The next prime is 28135360343. The reversal of 28135360321 is 12306353182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18445714225 + 9689646096 = 135815^2 + 98436^2 .

It is a cyclic number.

It is not a de Polignac number, because 28135360321 - 2¹³ = 28135352129 is a prime.

It is not a weakly prime, because it can be changed into another prime (28135360361) 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, 14067680160 + 14067680161.

It is an arithmetic number, because the mean of its divisors is an integer number (14067680161).

Almost surely, 2^28135360321 is an apocalyptic number.

It is an amenable number.

28135360321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28135360321 is an equidigital number, since it uses as much as digits as its factorization.

28135360321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 28135360321 in words is "twenty-eight billion, one hundred thirty-five million, three hundred sixty thousand, three hundred twenty-one".