9664191646 has 8 divisors (see below), whose sum is σ = 14501438280. Its totient is φ = 4830378888.

The previous prime is 9664191643. The next prime is 9664191659. The reversal of 9664191646 is 6461914669.

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

It is a junction number, because it is equal to n+sod(n) for n = 9664191593 and 9664191602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664191643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851421 + ... + 862696.

It is an arithmetic number, because the mean of its divisors is an integer number (1812679785).

Almost surely, 2^9664191646 is an apocalyptic number.

9664191646 is a deficient number, since it is larger than the sum of its proper divisors (4837246634).

9664191646 is a wasteful number, since it uses less digits than its factorization.

9664191646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716938.

The product of its digits is 1679616, while the sum is 52.

The square root of 9664191646 is about 98306.6205603671. The cubic root of 9664191646 is about 2130.0436887010.

The spelling of 9664191646 in words is "nine billion, six hundred sixty-four million, one hundred ninety-one thousand, six hundred forty-six".