28683313181 has 2 divisors, whose sum is σ = 28683313182. Its totient is φ = 28683313180.

The previous prime is 28683313171. The next prime is 28683313237. The reversal of 28683313181 is 18131338682.

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., 28599883225 + 83429956 = 169115^2 + 9134^2 .

It is a cyclic number.

It is not a de Polignac number, because 28683313181 - 2¹⁴ = 28683296797 is a prime.

It is a super-2 number, since 2×28683313181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28683313171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14341656590 + 14341656591.

It is an arithmetic number, because the mean of its divisors is an integer number (14341656591).

Almost surely, 2^28683313181 is an apocalyptic number.

It is an amenable number.

28683313181 is a deficient number, since it is larger than the sum of its proper divisors (1).

28683313181 is an equidigital number, since it uses as much as digits as its factorization.

28683313181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The spelling of 28683313181 in words is "twenty-eight billion, six hundred eighty-three million, three hundred thirteen thousand, one hundred eighty-one".