81696096 has 72 divisors (see below), whose sum is σ = 233297064. Its totient is φ = 27118080.

The previous prime is 81696073. The next prime is 81696119. The reversal of 81696096 is 69069618.

It is an interprime number because it is at equal distance from previous prime (81696073) and next prime (81696119).

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94900 + ... + 95756.

It is an arithmetic number, because the mean of its divisors is an integer number (3240237).

Almost surely, 2^81696096 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 81696096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116648532).

81696096 is an abundant number, since it is smaller than the sum of its proper divisors (151600968).

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

81696096 is a wasteful number, since it uses less digits than its factorization.

81696096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 81696096 is about 9038.5892704559. The cubic root of 81696096 is about 433.9107746949.

The spelling of 81696096 in words is "eighty-one million, six hundred ninety-six thousand, ninety-six".