28522678272821 has 2 divisors, whose sum is σ = 28522678272822. Its totient is φ = 28522678272820.

The previous prime is 28522678272799. The next prime is 28522678272827. The reversal of 28522678272821 is 12827287622582.

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., 28442606251921 + 80072020900 = 5333161^2 + 282970^2 .

It is a cyclic number.

It is not a de Polignac number, because 28522678272821 - 2¹⁸ = 28522678010677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28522678272827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14261339136410 + 14261339136411.

It is an arithmetic number, because the mean of its divisors is an integer number (14261339136411).

Almost surely, 2^{28522678272821} is an apocalyptic number.

It is an amenable number.

28522678272821 is a deficient number, since it is larger than the sum of its proper divisors (1).

28522678272821 is an equidigital number, since it uses as much as digits as its factorization.

28522678272821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48168960, while the sum is 62.

The spelling of 28522678272821 in words is "twenty-eight trillion, five hundred twenty-two billion, six hundred seventy-eight million, two hundred seventy-two thousand, eight hundred twenty-one".