28817237161 has 2 divisors, whose sum is σ = 28817237162. Its totient is φ = 28817237160.

The previous prime is 28817237159. The next prime is 28817237173. The reversal of 28817237161 is 16173271882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28486688400 + 330548761 = 168780^2 + 18181^2 .

It is a cyclic number.

It is not a de Polignac number, because 28817237161 - 2¹ = 28817237159 is a prime.

Together with 28817237159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28817237101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14408618580 + 14408618581.

It is an arithmetic number, because the mean of its divisors is an integer number (14408618581).

Almost surely, 2^28817237161 is an apocalyptic number.

It is an amenable number.

28817237161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28817237161 is an equidigital number, since it uses as much as digits as its factorization.

28817237161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The spelling of 28817237161 in words is "twenty-eight billion, eight hundred seventeen million, two hundred thirty-seven thousand, one hundred sixty-one".