81080323394 has 8 divisors (see below), whose sum is σ = 138994840128. Its totient is φ = 34748710020.

The previous prime is 81080323391. The next prime is 81080323433. The reversal of 81080323394 is 49332308018.

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

It is not an unprimeable number, because it can be changed into a prime (81080323391) 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, 2895725822 + ... + 2895725849.

It is an arithmetic number, because the mean of its divisors is an integer number (17374355016).

Almost surely, 2^81080323394 is an apocalyptic number.

81080323394 is a deficient number, since it is larger than the sum of its proper divisors (57914516734).

81080323394 is a wasteful number, since it uses less digits than its factorization.

81080323394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791451680.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 81080323394 in words is "eighty-one billion, eighty million, three hundred twenty-three thousand, three hundred ninety-four".