16065843333821 has 2 divisors, whose sum is σ = 16065843333822. Its totient is φ = 16065843333820.

The previous prime is 16065843333803. The next prime is 16065843333847. The reversal of 16065843333821 is 12833334856061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13348244925625 + 2717598408196 = 3653525^2 + 1648514^2 .

It is a cyclic number.

It is not a de Polignac number, because 16065843333821 - 2¹⁰ = 16065843332797 is a prime.

It is a super-2 number, since 2×16065843333821² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16065843338821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8032921666910 + 8032921666911.

It is an arithmetic number, because the mean of its divisors is an integer number (8032921666911).

Almost surely, 2^{16065843333821} is an apocalyptic number.

It is an amenable number.

16065843333821 is a deficient number, since it is larger than the sum of its proper divisors (1).

16065843333821 is an equidigital number, since it uses as much as digits as its factorization.

16065843333821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 16065843333821 in words is "sixteen trillion, sixty-five billion, eight hundred forty-three million, three hundred thirty-three thousand, eight hundred twenty-one".