28076737181 has 2 divisors, whose sum is σ = 28076737182. Its totient is φ = 28076737180.

The previous prime is 28076737081. The next prime is 28076737187. The reversal of 28076737181 is 18173767082.

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., 23266621156 + 4810116025 = 152534^2 + 69355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28076737181 is a prime.

It is a super-2 number, since 2×28076737181² (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 (28076737187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14038368590 + 14038368591.

It is an arithmetic number, because the mean of its divisors is an integer number (14038368591).

Almost surely, 2^28076737181 is an apocalyptic number.

It is an amenable number.

28076737181 is a deficient number, since it is larger than the sum of its proper divisors (1).

28076737181 is an equidigital number, since it uses as much as digits as its factorization.

28076737181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 28076737181 in words is "twenty-eight billion, seventy-six million, seven hundred thirty-seven thousand, one hundred eighty-one".