81105682 has 24 divisors (see below), whose sum is σ = 147678336. Its totient is φ = 33247368.

The previous prime is 81105671. The next prime is 81105683. The reversal of 81105682 is 28650118.

It is not an unprimeable number, because it can be changed into a prime (81105683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15738 + ... + 20245.

It is an arithmetic number, because the mean of its divisors is an integer number (6153264).

Almost surely, 2^81105682 is an apocalyptic number.

81105682 is a deficient number, since it is larger than the sum of its proper divisors (66572654).

81105682 is a wasteful number, since it uses less digits than its factorization.

81105682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36022 (or 36015 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 81105682 is about 9005.8693084010. The cubic root of 81105682 is about 432.8629619304.

The spelling of 81105682 in words is "eighty-one million, one hundred five thousand, six hundred eighty-two".