28413532321 has 2 divisors, whose sum is σ = 28413532322. Its totient is φ = 28413532320.

The previous prime is 28413532319. The next prime is 28413532361. The reversal of 28413532321 is 12323531482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19053937296 + 9359595025 = 138036^2 + 96745^2 .

It is a cyclic number.

It is not a de Polignac number, because 28413532321 - 2¹ = 28413532319 is a prime.

Together with 28413532319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28413532361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14206766160 + 14206766161.

It is an arithmetic number, because the mean of its divisors is an integer number (14206766161).

Almost surely, 2^28413532321 is an apocalyptic number.

It is an amenable number.

28413532321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28413532321 is an equidigital number, since it uses as much as digits as its factorization.

28413532321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The spelling of 28413532321 in words is "twenty-eight billion, four hundred thirteen million, five hundred thirty-two thousand, three hundred twenty-one".