81646482 has 8 divisors (see below), whose sum is σ = 163292976. Its totient is φ = 27215492.

The previous prime is 81646471. The next prime is 81646483. The reversal of 81646482 is 28464618.

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

81646482 is an admirable number.

It is a super-2 number, since 2×81646482² = 13332296045952648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81646482.

It is not an unprimeable number, because it can be changed into a prime (81646483) 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, 6803868 + ... + 6803879.

It is an arithmetic number, because the mean of its divisors is an integer number (20411622).

Almost surely, 2^81646482 is an apocalyptic number.

81646482 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81646482 is a wasteful number, since it uses less digits than its factorization.

81646482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607752.

The product of its digits is 73728, while the sum is 39.

The square root of 81646482 is about 9035.8442881670. The cubic root of 81646482 is about 433.8229189723.

It can be divided in two parts, 81646 and 482, that added together give a palindrome (82128).

The spelling of 81646482 in words is "eighty-one million, six hundred forty-six thousand, four hundred eighty-two".