80517816 has 24 divisors (see below), whose sum is σ = 218069280. Its totient is φ = 26839248.

The previous prime is 80517803. The next prime is 80517817. The reversal of 80517816 is 61871508.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80517817) 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 5 ways as a sum of consecutive naturals, for example, 559080 + ... + 559223.

It is an arithmetic number, because the mean of its divisors is an integer number (9086220).

Almost surely, 2^80517816 is an apocalyptic number.

It is an amenable number.

80517816 is an abundant number, since it is smaller than the sum of its proper divisors (137551464).

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

80517816 is a wasteful number, since it uses less digits than its factorization.

80517816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118315 (or 1118308 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 80517816 is about 8973.1720143994. The cubic root of 80517816 is about 431.8146066636.

The spelling of 80517816 in words is "eighty million, five hundred seventeen thousand, eight hundred sixteen".