16198778880 has 360 divisors, whose sum is σ = 56923356672. Its totient is φ = 4260888576.

The previous prime is 16198778867. The next prime is 16198778887. The reversal of 16198778880 is 8887789161.

16198778880 is a `hidden beast` number, since 1 + 619 + 8 + 7 + 7 + 8 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16198778887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93634474 + ... + 93634646.

Almost surely, 2^16198778880 is an apocalyptic number.

16198778880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16198778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28461678336).

16198778880 is an abundant number, since it is smaller than the sum of its proper divisors (40724577792).

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

16198778880 is a wasteful number, since it uses less digits than its factorization.

16198778880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 63.

The spelling of 16198778880 in words is "sixteen billion, one hundred ninety-eight million, seven hundred seventy-eight thousand, eight hundred eighty".