81648096 has 48 divisors (see below), whose sum is σ = 216929664. Its totient is φ = 26885504.

The previous prime is 81648089. The next prime is 81648109. The reversal of 81648096 is 69084618.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2845 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (4519368).

Almost surely, 2^81648096 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 81648096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108464832).

81648096 is an abundant number, since it is smaller than the sum of its proper divisors (135281568).

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

81648096 is a wasteful number, since it uses less digits than its factorization.

81648096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343 (or 10335 counting only the distinct ones).

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

The square root of 81648096 is about 9035.9335986936. The cubic root of 81648096 is about 433.8257775791.

The spelling of 81648096 in words is "eighty-one million, six hundred forty-eight thousand, ninety-six".