28075444961 has 2 divisors, whose sum is σ = 28075444962. Its totient is φ = 28075444960.

The previous prime is 28075444951. The next prime is 28075444963. The reversal of 28075444961 is 16944457082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26308840000 + 1766604961 = 162200^2 + 42031^2 .

It is a cyclic number.

It is not a de Polignac number, because 28075444961 - 2³⁰ = 27001703137 is a prime.

Together with 28075444963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28075444963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037722480 + 14037722481.

It is an arithmetic number, because the mean of its divisors is an integer number (14037722481).

Almost surely, 2^28075444961 is an apocalyptic number.

It is an amenable number.

28075444961 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075444961 is an equidigital number, since it uses as much as digits as its factorization.

28075444961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 28075444961 in words is "twenty-eight billion, seventy-five million, four hundred forty-four thousand, nine hundred sixty-one".