80449918 has 4 divisors (see below), whose sum is σ = 120674880. Its totient is φ = 40224958.

The previous prime is 80449909. The next prime is 80449949. The reversal of 80449918 is 81994408.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20112478 + ... + 20112481.

It is an arithmetic number, because the mean of its divisors is an integer number (30168720).

Almost surely, 2^80449918 is an apocalyptic number.

80449918 is a deficient number, since it is larger than the sum of its proper divisors (40224962).

80449918 is a wasteful number, since it uses less digits than its factorization.

80449918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40224961.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 80449918 is about 8969.3878274941. The cubic root of 80449918 is about 431.6931942242.

The spelling of 80449918 in words is "eighty million, four hundred forty-nine thousand, nine hundred eighteen".