80721104 has 20 divisors (see below), whose sum is σ = 156582240. Its totient is φ = 40312800.

The previous prime is 80721097. The next prime is 80721133. The reversal of 80721104 is 40112708.

It is a self number, because there is not a number n which added to its sum of digits gives 80721104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13829 + ... + 18779.

It is an arithmetic number, because the mean of its divisors is an integer number (7829112).

Almost surely, 2^80721104 is an apocalyptic number.

It is an amenable number.

80721104 is a deficient number, since it is larger than the sum of its proper divisors (75861136).

80721104 is a wasteful number, since it uses less digits than its factorization.

80721104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978 (or 5972 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 80721104 is about 8984.4924174936. The cubic root of 80721104 is about 432.1777103792.

The spelling of 80721104 in words is "eighty million, seven hundred twenty-one thousand, one hundred four".