28045508231497 has 2 divisors, whose sum is σ = 28045508231498. Its totient is φ = 28045508231496.

The previous prime is 28045508231473. The next prime is 28045508231519. The reversal of 28045508231497 is 79413280554082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14520207470521 + 13525300760976 = 3810539^2 + 3677676^2 .

It is a cyclic number.

It is not a de Polignac number, because 28045508231497 - 2¹¹ = 28045508229449 is a prime.

It is a super-2 number, since 2×28045508231497² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28045508231417) 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, 14022754115748 + 14022754115749.

It is an arithmetic number, because the mean of its divisors is an integer number (14022754115749).

Almost surely, 2^{28045508231497} is an apocalyptic number.

It is an amenable number.

28045508231497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28045508231497 is an equidigital number, since it uses as much as digits as its factorization.

28045508231497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 28045508231497 in words is "twenty-eight trillion, forty-five billion, five hundred eight million, two hundred thirty-one thousand, four hundred ninety-seven".