81486318 has 8 divisors (see below), whose sum is σ = 162972648. Its totient is φ = 27162104.

The previous prime is 81486241. The next prime is 81486359. The reversal of 81486318 is 81368418.

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

81486318 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6790521 + ... + 6790532.

It is an arithmetic number, because the mean of its divisors is an integer number (20371581).

Almost surely, 2^81486318 is an apocalyptic number.

81486318 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.

81486318 is a wasteful number, since it uses less digits than its factorization.

81486318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13581058.

The product of its digits is 36864, while the sum is 39.

The square root of 81486318 is about 9026.9772349331. The cubic root of 81486318 is about 433.5390598431.

The spelling of 81486318 in words is "eighty-one million, four hundred eighty-six thousand, three hundred eighteen".