8405643404 has 12 divisors (see below), whose sum is σ = 15575162904. Its totient is φ = 3955596864.

The previous prime is 8405643373. The next prime is 8405643469. The reversal of 8405643404 is 4043465048.

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, 61806134 + ... + 61806269.

It is an arithmetic number, because the mean of its divisors is an integer number (1297930242).

Almost surely, 2^8405643404 is an apocalyptic number.

It is an amenable number.

8405643404 is a deficient number, since it is larger than the sum of its proper divisors (7169519500).

8405643404 is a wasteful number, since it uses less digits than its factorization.

8405643404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123612424 (or 123612422 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 38.

The square root of 8405643404 is about 91682.2960227328. The cubic root of 8405643404 is about 2033.2478446784.

The spelling of 8405643404 in words is "eight billion, four hundred five million, six hundred forty-three thousand, four hundred four".