80816256 has 144 divisors (see below), whose sum is σ = 243592830. Its totient is φ = 25712640.

The previous prime is 80816233. The next prime is 80816269. The reversal of 80816256 is 65261808.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66977856 + 13838400 = 8184^2 + 3720^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 80816256.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1107036 + ... + 1107108.

Almost surely, 2^80816256 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 80816256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121796415).

80816256 is an abundant number, since it is smaller than the sum of its proper divisors (162776574).

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

80816256 is a wasteful number, since it uses less digits than its factorization.

80816256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 80816256 is about 8989.7862043544. The cubic root of 80816256 is about 432.3474570913.

The spelling of 80816256 in words is "eighty million, eight hundred sixteen thousand, two hundred fifty-six".