28032618161 has 2 divisors, whose sum is σ = 28032618162. Its totient is φ = 28032618160.

The previous prime is 28032618127. The next prime is 28032618191. The reversal of 28032618161 is 16181623082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27950824225 + 81793936 = 167185^2 + 9044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28032618161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28032618191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14016309080 + 14016309081.

It is an arithmetic number, because the mean of its divisors is an integer number (14016309081).

Almost surely, 2^28032618161 is an apocalyptic number.

It is an amenable number.

28032618161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28032618161 is an equidigital number, since it uses as much as digits as its factorization.

28032618161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 28032618161 in words is "twenty-eight billion, thirty-two million, six hundred eighteen thousand, one hundred sixty-one".