81760160 has 24 divisors (see below), whose sum is σ = 193158756. Its totient is φ = 32704000.

The previous prime is 81760139. The next prime is 81760163. The reversal of 81760160 is 6106718.

It can be written as a sum of positive squares in 2 ways, for example, as 80496784 + 1263376 = 8972^2 + 1124^2 .

It is not an unprimeable number, because it can be changed into a prime (81760163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255341 + ... + 255660.

Almost surely, 2^81760160 is an apocalyptic number.

81760160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81760160 is an abundant number, since it is smaller than the sum of its proper divisors (111398596).

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

81760160 is a wasteful number, since it uses less digits than its factorization.

81760160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511016 (or 511008 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 81760160 is about 9042.1324918406. The cubic root of 81760160 is about 434.0241656573.

Adding to 81760160 its reverse (6106718), we get a palindrome (87866878).

The spelling of 81760160 in words is "eighty-one million, seven hundred sixty thousand, one hundred sixty".