81244682 has 8 divisors (see below), whose sum is σ = 122031552. Its totient is φ = 40567500.

The previous prime is 81244679. The next prime is 81244697. The reversal of 81244682 is 28644218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81244682² = 13201396706562248, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 25544 + ... + 28547.

It is an arithmetic number, because the mean of its divisors is an integer number (15253944).

Almost surely, 2^81244682 is an apocalyptic number.

81244682 is a deficient number, since it is larger than the sum of its proper divisors (40786870).

81244682 is a wasteful number, since it uses less digits than its factorization.

81244682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54844.

The product of its digits is 24576, while the sum is 35.

The square root of 81244682 is about 9013.5831942685. The cubic root of 81244682 is about 433.1101029062.

The spelling of 81244682 in words is "eighty-one million, two hundred forty-four thousand, six hundred eighty-two".