80518716 has 72 divisors (see below), whose sum is σ = 209139840. Its totient is φ = 26111136.

The previous prime is 80518709. The next prime is 80518723. The reversal of 80518716 is 61781508.

It is an interprime number because it is at equal distance from previous prime (80518709) and next prime (80518723).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354595 + ... + 354821.

It is an arithmetic number, because the mean of its divisors is an integer number (2904720).

Almost surely, 2^80518716 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 80518716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104569920).

80518716 is an abundant number, since it is smaller than the sum of its proper divisors (128621124).

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

80518716 is a wasteful number, since it uses less digits than its factorization.

80518716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 458 counting only the distinct ones).

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

The square root of 80518716 is about 8973.2221637492. Note that the first 3 decimals coincide. The cubic root of 80518716 is about 431.8162155485.

The spelling of 80518716 in words is "eighty million, five hundred eighteen thousand, seven hundred sixteen".