16244520267281 has 2 divisors, whose sum is σ = 16244520267282. Its totient is φ = 16244520267280.

The previous prime is 16244520267251. The next prime is 16244520267319. The reversal of 16244520267281 is 18276202544261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14932157566225 + 1312362701056 = 3864215^2 + 1145584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16244520267281 is a prime.

It is a super-2 number, since 2×16244520267281² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16244520267251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8122260133640 + 8122260133641.

It is an arithmetic number, because the mean of its divisors is an integer number (8122260133641).

Almost surely, 2^{16244520267281} is an apocalyptic number.

It is an amenable number.

16244520267281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16244520267281 is an equidigital number, since it uses as much as digits as its factorization.

16244520267281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 16244520267281 in words is "sixteen trillion, two hundred forty-four billion, five hundred twenty million, two hundred sixty-seven thousand, two hundred eighty-one".