2016161280 has 480 divisors, whose sum is σ = 8293469184. Its totient is φ = 459841536.

The previous prime is 2016161267. The next prime is 2016161281. The reversal of 2016161280 is 821616102.

2016161280 is a `hidden beast` number, since 20 + 1 + 616 + 1 + 28 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016161281) 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 47 ways as a sum of consecutive naturals, for example, 4354329 + ... + 4354791.

Almost surely, 2^2016161280 is an apocalyptic number.

2016161280 is a gapful number since it is divisible by the number (20) 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 2016161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4146734592).

2016161280 is an abundant number, since it is smaller than the sum of its proper divisors (6277307904).

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

2016161280 is an frugal number, since it uses more digits than its factorization.

2016161280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2016161280 is about 44901.6846009145. The cubic root of 2016161280 is about 1263.3056058842.

Adding to 2016161280 its reverse (821616102), we get a palindrome (2837777382).

The spelling of 2016161280 in words is "two billion, sixteen million, one hundred sixty-one thousand, two hundred eighty".