80681818 has 16 divisors (see below), whose sum is σ = 138634560. Its totient is φ = 34497216.

The previous prime is 80681789. The next prime is 80681819. The reversal of 80681818 is 81818608.

It is not an unprimeable number, because it can be changed into a prime (80681819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (8664660).

Almost surely, 2^80681818 is an apocalyptic number.

80681818 is a deficient number, since it is larger than the sum of its proper divisors (57952742).

80681818 is a wasteful number, since it uses less digits than its factorization.

80681818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13461.

The product of its (nonzero) digits is 24576, while the sum is 40.

The square root of 80681818 is about 8982.3058286834. The cubic root of 80681818 is about 432.1075870870.

The spelling of 80681818 in words is "eighty million, six hundred eighty-one thousand, eight hundred eighteen".