81409328204 has 12 divisors (see below), whose sum is σ = 150846696504. Its totient is φ = 38310272064.

The previous prime is 81409328197. The next prime is 81409328227. The reversal of 81409328204 is 40282390418.

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 in 3 ways as a sum of consecutive naturals, for example, 598597934 + ... + 598598069.

It is an arithmetic number, because the mean of its divisors is an integer number (12570558042).

Almost surely, 2^81409328204 is an apocalyptic number.

It is an amenable number.

81409328204 is a deficient number, since it is larger than the sum of its proper divisors (69437368300).

81409328204 is a wasteful number, since it uses less digits than its factorization.

81409328204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197196024 (or 1197196022 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 81409328204 in words is "eighty-one billion, four hundred nine million, three hundred twenty-eight thousand, two hundred four".