81077016 has 64 divisors (see below), whose sum is σ = 208897920. Its totient is φ = 26208000.

The previous prime is 81076999. The next prime is 81077039. The reversal of 81077016 is 61077018.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 258876 + ... + 259188.

It is an arithmetic number, because the mean of its divisors is an integer number (3264030).

Almost surely, 2^81077016 is an apocalyptic number.

81077016 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81077016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104448960).

81077016 is an abundant number, since it is smaller than the sum of its proper divisors (127820904).

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

81077016 is a wasteful number, since it uses less digits than its factorization.

81077016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 81077016 is about 9004.2776500950. The cubic root of 81077016 is about 432.8119588788.

The spelling of 81077016 in words is "eighty-one million, seventy-seven thousand, sixteen".