28536618525517 has 2 divisors, whose sum is σ = 28536618525518. Its totient is φ = 28536618525516.

The previous prime is 28536618525497. The next prime is 28536618525563. The reversal of 28536618525517 is 71552581663582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28166679658441 + 369938867076 = 5307229^2 + 608226^2 .

It is a cyclic number.

It is not a de Polignac number, because 28536618525517 - 2²⁷ = 28536484307789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28536618325517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14268309262758 + 14268309262759.

It is an arithmetic number, because the mean of its divisors is an integer number (14268309262759).

Almost surely, 2^{28536618525517} is an apocalyptic number.

It is an amenable number.

28536618525517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28536618525517 is an equidigital number, since it uses as much as digits as its factorization.

28536618525517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960000, while the sum is 64.

The spelling of 28536618525517 in words is "twenty-eight trillion, five hundred thirty-six billion, six hundred eighteen million, five hundred twenty-five thousand, five hundred seventeen".