28057730497 has 2 divisors, whose sum is σ = 28057730498. Its totient is φ = 28057730496.

The previous prime is 28057730453. The next prime is 28057730507. The reversal of 28057730497 is 79403775082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22763567376 + 5294163121 = 150876^2 + 72761^2 .

It is a cyclic number.

It is not a de Polignac number, because 28057730497 - 2¹¹ = 28057728449 is a prime.

It is not a weakly prime, because it can be changed into another prime (28057730417) 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, 14028865248 + 14028865249.

It is an arithmetic number, because the mean of its divisors is an integer number (14028865249).

Almost surely, 2^28057730497 is an apocalyptic number.

It is an amenable number.

28057730497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057730497 is an equidigital number, since it uses as much as digits as its factorization.

28057730497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 28057730497 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty thousand, four hundred ninety-seven".