9651274661 has 8 divisors (see below), whose sum is σ = 11255131200. Its totient is φ = 8272520844.

The previous prime is 9651274627. The next prime is 9651274667. The reversal of 9651274661 is 1664721569.

9651274661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9651274661 - 2³⁰ = 8577532837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9651274667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14068571 + ... + 14069256.

It is an arithmetic number, because the mean of its divisors is an integer number (1406891400).

Almost surely, 2^9651274661 is an apocalyptic number.

It is an amenable number.

9651274661 is a deficient number, since it is larger than the sum of its proper divisors (1603856539).

9651274661 is an equidigital number, since it uses as much as digits as its factorization.

9651274661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28137848 (or 28137834 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 9651274661 is about 98240.9011613798. The cubic root of 9651274661 is about 2129.0942728706.

The spelling of 9651274661 in words is "nine billion, six hundred fifty-one million, two hundred seventy-four thousand, six hundred sixty-one".