28368277169 has 2 divisors, whose sum is σ = 28368277170. Its totient is φ = 28368277168.

The previous prime is 28368277139. The next prime is 28368277177. The reversal of 28368277169 is 96177286382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20243598400 + 8124678769 = 142280^2 + 90137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28368277169 is a prime.

It is a super-2 number, since 2×28368277169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28368277109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14184138584 + 14184138585.

It is an arithmetic number, because the mean of its divisors is an integer number (14184138585).

Almost surely, 2^28368277169 is an apocalyptic number.

It is an amenable number.

28368277169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28368277169 is an equidigital number, since it uses as much as digits as its factorization.

28368277169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 59.

The spelling of 28368277169 in words is "twenty-eight billion, three hundred sixty-eight million, two hundred seventy-seven thousand, one hundred sixty-nine".