9664490651 has 4 divisors (see below), whose sum is σ = 9674243904. Its totient is φ = 9654737400.

The previous prime is 9664490639. The next prime is 9664490663. The reversal of 9664490651 is 1560944669.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (9664490639) and next prime (9664490663).

It is a cyclic number.

It is not a de Polignac number, because 9664490651 - 2¹⁸ = 9664228507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9664490651.

It is not an unprimeable number, because it can be changed into a prime (9664490621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4875140 + ... + 4877121.

It is an arithmetic number, because the mean of its divisors is an integer number (2418560976).

Almost surely, 2^9664490651 is an apocalyptic number.

9664490651 is a deficient number, since it is larger than the sum of its proper divisors (9753253).

9664490651 is an equidigital number, since it uses as much as digits as its factorization.

9664490651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9753252.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 9664490651 is about 98308.1413261384. The cubic root of 9664490651 is about 2130.0656559512.

The spelling of 9664490651 in words is "nine billion, six hundred sixty-four million, four hundred ninety thousand, six hundred fifty-one".