16778916906 has 8 divisors (see below), whose sum is σ = 33557833824. Its totient is φ = 5592972300.

The previous prime is 16778916901. The next prime is 16778916911. The reversal of 16778916906 is 60961987761.

16778916906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16778916901) and next prime (16778916911).

It is a sphenic number, since it is the product of 3 distinct primes.

16778916906 is an admirable number.

It is a super-2 number, since 2×16778916906² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16778916906.

It is not an unprimeable number, because it can be changed into a prime (16778916901) 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 in 3 ways as a sum of consecutive naturals, for example, 1398243070 + ... + 1398243081.

It is an arithmetic number, because the mean of its divisors is an integer number (4194729228).

Almost surely, 2^16778916906 is an apocalyptic number.

16778916906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16778916906 is a wasteful number, since it uses less digits than its factorization.

16778916906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796486156.

The product of its (nonzero) digits is 6858432, while the sum is 60.

The spelling of 16778916906 in words is "sixteen billion, seven hundred seventy-eight million, nine hundred sixteen thousand, nine hundred six".