9644664655 has 8 divisors (see below), whose sum is σ = 12254397552. Its totient is φ = 7261865088.

The previous prime is 9644664649. The next prime is 9644664721. The reversal of 9644664655 is 5564664469.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9644664655 - 2¹⁹ = 9644140367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9644664596 and 9644664605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56733237 + ... + 56733406.

It is an arithmetic number, because the mean of its divisors is an integer number (1531799694).

Almost surely, 2^9644664655 is an apocalyptic number.

9644664655 is a deficient number, since it is larger than the sum of its proper divisors (2609732897).

9644664655 is a wasteful number, since it uses less digits than its factorization.

9644664655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113466665.

The product of its digits is 18662400, while the sum is 55.

The square root of 9644664655 is about 98207.2535763016. The cubic root of 9644664655 is about 2128.6081008190.

The spelling of 9644664655 in words is "nine billion, six hundred forty-four million, six hundred sixty-four thousand, six hundred fifty-five".