16387777878 has 16 divisors (see below), whose sum is σ = 34703529840. Its totient is φ = 5141263616.

The previous prime is 16387777853. The next prime is 16387777891. The reversal of 16387777878 is 87877778361.

16387777878 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 7 ways as a sum of consecutive naturals, for example, 80332143 + ... + 80332346.

It is an arithmetic number, because the mean of its divisors is an integer number (2168970615).

Almost surely, 2^16387777878 is an apocalyptic number.

16387777878 is an abundant number, since it is smaller than the sum of its proper divisors (18315751962).

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

16387777878 is a wasteful number, since it uses less digits than its factorization.

16387777878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160664511.

The product of its digits is 154893312, while the sum is 69.

The spelling of 16387777878 in words is "sixteen billion, three hundred eighty-seven million, seven hundred seventy-seven thousand, eight hundred seventy-eight".