80640716 has 18 divisors (see below), whose sum is σ = 152813052. Its totient is φ = 37218480.

The previous prime is 80640713. The next prime is 80640739. The reversal of 80640716 is 61704608.

It is not an unprimeable number, because it can be changed into a prime (80640713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58970 + ... + 60321.

It is an arithmetic number, because the mean of its divisors is an integer number (8489614).

Almost surely, 2^80640716 is an apocalyptic number.

It is an amenable number.

80640716 is a deficient number, since it is larger than the sum of its proper divisors (72172336).

80640716 is a wasteful number, since it uses less digits than its factorization.

80640716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119321 (or 119306 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 80640716 is about 8980.0175946376. The cubic root of 80640716 is about 432.0341979672.

The spelling of 80640716 in words is "eighty million, six hundred forty thousand, seven hundred sixteen".