80721112 has 8 divisors (see below), whose sum is σ = 151352100. Its totient is φ = 40360552.

The previous prime is 80721097. The next prime is 80721133. The reversal of 80721112 is 21112708.

It is a tau number, because it is divible by the number of its divisors (8).

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, 5045062 + ... + 5045077.

Almost surely, 2^80721112 is an apocalyptic number.

It is an amenable number.

80721112 is a deficient number, since it is larger than the sum of its proper divisors (70630988).

80721112 is a wasteful number, since it uses less digits than its factorization.

80721112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10090145 (or 10090141 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 80721112 is about 8984.4928627052. The cubic root of 80721112 is about 432.1777246565.

The spelling of 80721112 in words is "eighty million, seven hundred twenty-one thousand, one hundred twelve".