8644432406 has 16 divisors (see below), whose sum is σ = 13147596000. Its totient is φ = 4262161728.

The previous prime is 8644432387. The next prime is 8644432421. The reversal of 8644432406 is 6042344468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295 + ... + 131493.

It is an arithmetic number, because the mean of its divisors is an integer number (821724750).

Almost surely, 2^8644432406 is an apocalyptic number.

8644432406 is a deficient number, since it is larger than the sum of its proper divisors (4503163594).

8644432406 is a wasteful number, since it uses less digits than its factorization.

8644432406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130663.

The product of its (nonzero) digits is 442368, while the sum is 41.

The square root of 8644432406 is about 92975.4397999816. The cubic root of 8644432406 is about 2052.3219698976.

The spelling of 8644432406 in words is "eight billion, six hundred forty-four million, four hundred thirty-two thousand, four hundred six".