1805664404 has 12 divisors (see below), whose sum is σ = 3297300384. Its totient is φ = 863578584.

The previous prime is 1805664389. The next prime is 1805664407. The reversal of 1805664404 is 4044665081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805664407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9813302 + ... + 9813485.

It is an arithmetic number, because the mean of its divisors is an integer number (274775032).

Almost surely, 2^1805664404 is an apocalyptic number.

It is an amenable number.

1805664404 is a deficient number, since it is larger than the sum of its proper divisors (1491635980).

1805664404 is a wasteful number, since it uses less digits than its factorization.

1805664404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19626814 (or 19626812 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 1805664404 is about 42493.1100768113. The cubic root of 1805664404 is about 1217.7150647966.

The spelling of 1805664404 in words is "one billion, eight hundred five million, six hundred sixty-four thousand, four hundred four".