81089384292 has 144 divisors (see below), whose sum is σ = 246230030592. Its totient is φ = 21999098880.

The previous prime is 81089384281. The next prime is 81089384339. The reversal of 81089384292 is 29248398018.

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 47 ways as a sum of consecutive naturals, for example, 742992 + ... + 845112.

It is an arithmetic number, because the mean of its divisors is an integer number (1709930768).

Almost surely, 2^81089384292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81089384292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123115015296).

81089384292 is an abundant number, since it is smaller than the sum of its proper divisors (165140646300).

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

81089384292 is a wasteful number, since it uses less digits than its factorization.

81089384292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102298 (or 102293 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 81089384292 in words is "eighty-one billion, eighty-nine million, three hundred eighty-four thousand, two hundred ninety-two".