81090308328 has 16 divisors (see below), whose sum is σ = 202725770880. Its totient is φ = 27030102768.

The previous prime is 81090308311. The next prime is 81090308353. The reversal of 81090308328 is 82380309018.

It is a self number, because there is not a number n which added to its sum of digits gives 81090308328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689381400 + ... + 1689381447.

It is an arithmetic number, because the mean of its divisors is an integer number (12670360680).

Almost surely, 2^81090308328 is an apocalyptic number.

It is an amenable number.

81090308328 is an abundant number, since it is smaller than the sum of its proper divisors (121635462552).

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

81090308328 is a wasteful number, since it uses less digits than its factorization.

81090308328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378762856 (or 3378762852 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 81090308328 in words is "eighty-one billion, ninety million, three hundred eight thousand, three hundred twenty-eight".