16788775878 has 80 divisors (see below), whose sum is σ = 43044528384. Its totient is φ = 4791098160.

The previous prime is 16788775853. The next prime is 16788775891. The reversal of 16788775878 is 87857788761.

16788775878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 in 39 ways as a sum of consecutive naturals, for example, 997513 + ... + 1014203.

Almost surely, 2^16788775878 is an apocalyptic number.

16788775878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16788775878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21522264192).

16788775878 is an abundant number, since it is smaller than the sum of its proper divisors (26255752506).

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

16788775878 is a wasteful number, since it uses less digits than its factorization.

16788775878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17599 (or 17590 counting only the distinct ones).

The product of its digits is 295034880, while the sum is 72.

The spelling of 16788775878 in words is "sixteen billion, seven hundred eighty-eight million, seven hundred seventy-five thousand, eight hundred seventy-eight".