28088168252257 has 2 divisors, whose sum is σ = 28088168252258. Its totient is φ = 28088168252256.

The previous prime is 28088168252227. The next prime is 28088168252281. The reversal of 28088168252257 is 75225286188082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26938964956176 + 1149203296081 = 5190276^2 + 1072009^2 .

It is a cyclic number.

It is not a de Polignac number, because 28088168252257 - 2¹¹ = 28088168250209 is a prime.

It is not a weakly prime, because it can be changed into another prime (28088168252227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14044084126128 + 14044084126129.

It is an arithmetic number, because the mean of its divisors is an integer number (14044084126129).

Almost surely, 2^{28088168252257} is an apocalyptic number.

It is an amenable number.

28088168252257 is a deficient number, since it is larger than the sum of its proper divisors (1).

28088168252257 is an equidigital number, since it uses as much as digits as its factorization.

28088168252257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68812800, while the sum is 64.

The spelling of 28088168252257 in words is "twenty-eight trillion, eighty-eight billion, one hundred sixty-eight million, two hundred fifty-two thousand, two hundred fifty-seven".