80917718 has 24 divisors (see below), whose sum is σ = 142462152. Its totient is φ = 34367424.

The previous prime is 80917717. The next prime is 80917747. The reversal of 80917718 is 81771908.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80917717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7421 + ... + 14727.

It is an arithmetic number, because the mean of its divisors is an integer number (5935923).

Almost surely, 2^80917718 is an apocalyptic number.

80917718 is a deficient number, since it is larger than the sum of its proper divisors (61544434).

80917718 is a wasteful number, since it uses less digits than its factorization.

80917718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436 (or 7429 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 80917718 is about 8995.4276162948. The cubic root of 80917718 is about 432.5283138268.

The spelling of 80917718 in words is "eighty million, nine hundred seventeen thousand, seven hundred eighteen".