81073416 has 16 divisors (see below), whose sum is σ = 202683600. Its totient is φ = 27024464.

The previous prime is 81073403. The next prime is 81073423. The reversal of 81073416 is 61437018.

It is a happy number.

81073416 is nontrivially palindromic in base 5.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689006 + ... + 1689053.

It is an arithmetic number, because the mean of its divisors is an integer number (12667725).

Almost surely, 2^81073416 is an apocalyptic number.

It is an amenable number.

81073416 is an abundant number, since it is smaller than the sum of its proper divisors (121610184).

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

81073416 is a wasteful number, since it uses less digits than its factorization.

81073416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378068 (or 3378064 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 81073416 is about 9004.0777428896. The cubic root of 81073416 is about 432.8055528459.

The spelling of 81073416 in words is "eighty-one million, seventy-three thousand, four hundred sixteen".