81080160 has 192 divisors, whose sum is σ = 297561600. Its totient is φ = 18173952.

The previous prime is 81080141. The next prime is 81080171. The reversal of 81080160 is 6108018.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 81080160.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198036 + ... + 198444.

It is an arithmetic number, because the mean of its divisors is an integer number (1549800).

Almost surely, 2^81080160 is an apocalyptic number.

81080160 is a gapful number since it is divisible by the number (80) 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 81080160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148780800).

81080160 is an abundant number, since it is smaller than the sum of its proper divisors (216481440).

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

81080160 is a wasteful number, since it uses less digits than its factorization.

81080160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 81080160 is about 9004.4522320905. The cubic root of 81080160 is about 432.8175533259.

Adding to 81080160 its reverse (6108018), we get a palindrome (87188178).

The spelling of 81080160 in words is "eighty-one million, eighty thousand, one hundred sixty".