16181273393 has 2 divisors, whose sum is σ = 16181273394. Its totient is φ = 16181273392.

The previous prime is 16181273371. The next prime is 16181273399. The reversal of 16181273393 is 39337218161.

16181273393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13831641664 + 2349631729 = 117608^2 + 48473^2 .

It is a cyclic number.

It is not a de Polignac number, because 16181273393 - 2¹² = 16181269297 is a prime.

It is not a weakly prime, because it can be changed into another prime (16181273399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8090636696 + 8090636697.

It is an arithmetic number, because the mean of its divisors is an integer number (8090636697).

Almost surely, 2^16181273393 is an apocalyptic number.

It is an amenable number.

16181273393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16181273393 is an equidigital number, since it uses as much as digits as its factorization.

16181273393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The spelling of 16181273393 in words is "sixteen billion, one hundred eighty-one million, two hundred seventy-three thousand, three hundred ninety-three".