16249467281 has 2 divisors, whose sum is σ = 16249467282. Its totient is φ = 16249467280.

The previous prime is 16249467217. The next prime is 16249467287. The reversal of 16249467281 is 18276494261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11016391681 + 5233075600 = 104959^2 + 72340^2 .

It is a cyclic number.

It is not a de Polignac number, because 16249467281 - 2⁶ = 16249467217 is a prime.

It is a super-2 number, since 2×16249467281² (a number of 21 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 (16249467287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8124733640 + 8124733641.

It is an arithmetic number, because the mean of its divisors is an integer number (8124733641).

Almost surely, 2^16249467281 is an apocalyptic number.

It is an amenable number.

16249467281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16249467281 is an equidigital number, since it uses as much as digits as its factorization.

16249467281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The spelling of 16249467281 in words is "sixteen billion, two hundred forty-nine million, four hundred sixty-seven thousand, two hundred eighty-one".