16549198128 has 140 divisors (see below), whose sum is σ = 48169428120. Its totient is φ = 5505470208.

The previous prime is 16549198123. The next prime is 16549198129. The reversal of 16549198128 is 82189194561.

16549198128 is a `hidden beast` number, since 1 + 6 + 549 + 1 + 98 + 1 + 2 + 8 = 666.

16549198128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16549198123) 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 27 ways as a sum of consecutive naturals, for example, 7685500 + ... + 7687652.

Almost surely, 2^16549198128 is an apocalyptic number.

16549198128 is a gapful number since it is divisible by the number (18) 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 16549198128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24084714060).

16549198128 is an abundant number, since it is smaller than the sum of its proper divisors (31620229992).

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

16549198128 is an equidigital number, since it uses as much as digits as its factorization.

16549198128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838 (or 2817 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 16549198128 in words is "sixteen billion, five hundred forty-nine million, one hundred ninety-eight thousand, one hundred twenty-eight".