80321818 has 8 divisors (see below), whose sum is σ = 122756148. Its totient is φ = 39403104.

The previous prime is 80321779. The next prime is 80321831. The reversal of 80321818 is 81812308.

It can be written as a sum of positive squares in 2 ways, for example, as 79977249 + 344569 = 8943^2 + 587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 80321818.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 378771 + ... + 378982.

Almost surely, 2^80321818 is an apocalyptic number.

80321818 is a deficient number, since it is larger than the sum of its proper divisors (42434330).

80321818 is a wasteful number, since it uses less digits than its factorization.

80321818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757808.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 80321818 is about 8962.2440270281. The cubic root of 80321818 is about 431.4639448692.

The spelling of 80321818 in words is "eighty million, three hundred twenty-one thousand, eight hundred eighteen".