81017416 has 32 divisors (see below), whose sum is σ = 158355000. Its totient is φ = 38811136.

The previous prime is 81017381. The next prime is 81017449. The reversal of 81017416 is 61471018.

It can be written as a sum of positive squares in 4 ways, for example, as 80460900 + 556516 = 8970^2 + 746^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30510 + ... + 33058.

Almost surely, 2^81017416 is an apocalyptic number.

It is an amenable number.

81017416 is a deficient number, since it is larger than the sum of its proper divisors (77337584).

81017416 is a wasteful number, since it uses less digits than its factorization.

81017416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2717 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 81017416 is about 9000.9675035520. The cubic root of 81017416 is about 432.7058790163.

The spelling of 81017416 in words is "eighty-one million, seventeen thousand, four hundred sixteen".