28050980921 has 2 divisors, whose sum is σ = 28050980922. Its totient is φ = 28050980920.

The previous prime is 28050980911. The next prime is 28050980927. The reversal of 28050980921 is 12908905082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26678648896 + 1372332025 = 163336^2 + 37045^2 .

It is a cyclic number.

It is not a de Polignac number, because 28050980921 - 2⁶ = 28050980857 is a prime.

It is not a weakly prime, because it can be changed into another prime (28050980927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14025490460 + 14025490461.

It is an arithmetic number, because the mean of its divisors is an integer number (14025490461).

Almost surely, 2^28050980921 is an apocalyptic number.

It is an amenable number.

28050980921 is a deficient number, since it is larger than the sum of its proper divisors (1).

28050980921 is an equidigital number, since it uses as much as digits as its factorization.

28050980921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 28050980921 in words is "twenty-eight billion, fifty million, nine hundred eighty thousand, nine hundred twenty-one".