81112760 has 32 divisors (see below), whose sum is σ = 186958800. Its totient is φ = 31653120.

The previous prime is 81112753. The next prime is 81112799. The reversal of 81112760 is 6721118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23090 + ... + 26369.

Almost surely, 2^81112760 is an apocalyptic number.

It is an amenable number.

81112760 is an abundant number, since it is smaller than the sum of its proper divisors (105846040).

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

81112760 is a wasteful number, since it uses less digits than its factorization.

81112760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49511 (or 49507 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 81112760 is about 9006.2622657793. The cubic root of 81112760 is about 432.8755533824.

Adding to 81112760 its reverse (6721118), we get a palindrome (87833878).

The spelling of 81112760 in words is "eighty-one million, one hundred twelve thousand, seven hundred sixty".