28636885581173 has 2 divisors, whose sum is σ = 28636885581174. Its totient is φ = 28636885581172.

The previous prime is 28636885581133. The next prime is 28636885581191. The reversal of 28636885581173 is 37118558863682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15373872428209 + 13263013152964 = 3920953^2 + 3641842^2 .

It is a cyclic number.

It is not a de Polignac number, because 28636885581173 - 2³⁸ = 28362007674229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28636885581097 and 28636885581106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28636885581103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14318442790586 + 14318442790587.

It is an arithmetic number, because the mean of its divisors is an integer number (14318442790587).

Almost surely, 2^{28636885581173} is an apocalyptic number.

It is an amenable number.

28636885581173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28636885581173 is an equidigital number, since it uses as much as digits as its factorization.

28636885581173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 464486400, while the sum is 71.

The spelling of 28636885581173 in words is "twenty-eight trillion, six hundred thirty-six billion, eight hundred eighty-five million, five hundred eighty-one thousand, one hundred seventy-three".