16159993393 has 2 divisors, whose sum is σ = 16159993394. Its totient is φ = 16159993392.

The previous prime is 16159993391. The next prime is 16159993439. The reversal of 16159993393 is 39339995161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14235591969 + 1924401424 = 119313^2 + 43868^2 .

It is a cyclic number.

It is not a de Polignac number, because 16159993393 - 2¹ = 16159993391 is a prime.

It is a super-2 number, since 2×16159993393² (a number of 21 digits) contains 22 as substring.

Together with 16159993391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16159993391) 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, 8079996696 + 8079996697.

It is an arithmetic number, because the mean of its divisors is an integer number (8079996697).

Almost surely, 2^16159993393 is an apocalyptic number.

It is an amenable number.

16159993393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16159993393 is an equidigital number, since it uses as much as digits as its factorization.

16159993393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5314410, while the sum is 58.

The spelling of 16159993393 in words is "sixteen billion, one hundred fifty-nine million, nine hundred ninety-three thousand, three hundred ninety-three".