81468016 has 40 divisors (see below), whose sum is σ = 180818784. Its totient is φ = 34832640.

The previous prime is 81468011. The next prime is 81468053. The reversal of 81468016 is 61086418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81468011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86106 + ... + 87046.

Almost surely, 2^81468016 is an apocalyptic number.

It is an amenable number.

81468016 is an abundant number, since it is smaller than the sum of its proper divisors (99350768).

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

81468016 is a wasteful number, since it uses less digits than its factorization.

81468016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 81468016 is about 9025.9634388801. The cubic root of 81468016 is about 433.5065994817.

The spelling of 81468016 in words is "eighty-one million, four hundred sixty-eight thousand, sixteen".