16623463393 has 2 divisors, whose sum is σ = 16623463394. Its totient is φ = 16623463392.

The previous prime is 16623463387. The next prime is 16623463453. The reversal of 16623463393 is 39336432661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16076464849 + 546998544 = 126793^2 + 23388^2 .

It is an emirp because it is prime and its reverse (39336432661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16623463393 - 2⁵ = 16623463361 is a prime.

It is a super-2 number, since 2×16623463393² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16623463313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311731696 + 8311731697.

It is an arithmetic number, because the mean of its divisors is an integer number (8311731697).

Almost surely, 2^16623463393 is an apocalyptic number.

It is an amenable number.

16623463393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16623463393 is an equidigital number, since it uses as much as digits as its factorization.

16623463393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 46.

The spelling of 16623463393 in words is "sixteen billion, six hundred twenty-three million, four hundred sixty-three thousand, three hundred ninety-three".