80731640404 has 6 divisors (see below), whose sum is σ = 141280370714. Its totient is φ = 40365820200.

The previous prime is 80731640389. The next prime is 80731640417. The reversal of 80731640404 is 40404613708.

It can be written as a sum of positive squares in only one way, i.e., 52592248900 + 28139391504 = 229330^2 + 167748^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091455047 + ... + 10091455054.

Almost surely, 2^80731640404 is an apocalyptic number.

It is an amenable number.

80731640404 is a deficient number, since it is larger than the sum of its proper divisors (60548730310).

80731640404 is a wasteful number, since it uses less digits than its factorization.

80731640404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20182910105 (or 20182910103 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 80731640404 in words is "eighty billion, seven hundred thirty-one million, six hundred forty thousand, four hundred four".