81008086 has 8 divisors (see below), whose sum is σ = 121592304. Its totient is φ = 40477320.

The previous prime is 81008071. The next prime is 81008129. The reversal of 81008086 is 68080018.

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

It is a congruent number.

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, 9330 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (15199038).

Almost surely, 2^81008086 is an apocalyptic number.

81008086 is a deficient number, since it is larger than the sum of its proper divisors (40584218).

81008086 is a wasteful number, since it uses less digits than its factorization.

81008086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26726.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 81008086 is about 9000.4492110116. The cubic root of 81008086 is about 432.6892681811.

The spelling of 81008086 in words is "eighty-one million, eight thousand, eighty-six".