9659567640 has 32 divisors (see below), whose sum is σ = 28978703280. Its totient is φ = 2575884672.

The previous prime is 9659567609. The next prime is 9659567647. The reversal of 9659567640 is 467659569.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9659567647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40248079 + ... + 40248318.

Almost surely, 2^9659567640 is an apocalyptic number.

It is an amenable number.

9659567640 is an abundant number, since it is smaller than the sum of its proper divisors (19319135640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9659567640 is a wasteful number, since it uses less digits than its factorization.

9659567640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80496411 (or 80496407 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 57.

The square root of 9659567640 is about 98283.0994627255. The cubic root of 9659567640 is about 2129.7039152901.

The spelling of 9659567640 in words is "nine billion, six hundred fifty-nine million, five hundred sixty-seven thousand, six hundred forty".