16943943886 has 4 divisors (see below), whose sum is σ = 25415915832. Its totient is φ = 8471971942.

The previous prime is 16943943871. The next prime is 16943943917. The reversal of 16943943886 is 68834934961.

16943943886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68834934961 = 13 ⋅5294994997.

It is a congruent number.

It is an unprimeable number.

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, 4235985970 + ... + 4235985973.

It is an arithmetic number, because the mean of its divisors is an integer number (6353978958).

Almost surely, 2^16943943886 is an apocalyptic number.

16943943886 is a deficient number, since it is larger than the sum of its proper divisors (8471971946).

16943943886 is an equidigital number, since it uses as much as digits as its factorization.

16943943886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8471971945.

The product of its digits is 26873856, while the sum is 61.

The spelling of 16943943886 in words is "sixteen billion, nine hundred forty-three million, nine hundred forty-three thousand, eight hundred eighty-six".