28081643741 has 2 divisors, whose sum is σ = 28081643742. Its totient is φ = 28081643740.

The previous prime is 28081643701. The next prime is 28081643753. The reversal of 28081643741 is 14734618082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20155480900 + 7926162841 = 141970^2 + 89029^2 .

It is a cyclic number.

It is not a de Polignac number, because 28081643741 - 2⁶ = 28081643677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28081643692 and 28081643701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28081643701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040821870 + 14040821871.

It is an arithmetic number, because the mean of its divisors is an integer number (14040821871).

Almost surely, 2^28081643741 is an apocalyptic number.

It is an amenable number.

28081643741 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081643741 is an equidigital number, since it uses as much as digits as its factorization.

28081643741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 28081643741 in words is "twenty-eight billion, eighty-one million, six hundred forty-three thousand, seven hundred forty-one".