9656896640 has 32 divisors (see below), whose sum is σ = 23086020060. Its totient is φ = 3862758400.

The previous prime is 9656896637. The next prime is 9656896651. The reversal of 9656896640 is 466986569.

It can be written as a sum of positive squares in 2 ways, for example, as 9652669504 + 4227136 = 98248^2 + 2056^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 9656896640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7543811 + ... + 7545090.

Almost surely, 2^9656896640 is an apocalyptic number.

It is an amenable number.

9656896640 is an abundant number, since it is smaller than the sum of its proper divisors (13429123420).

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

9656896640 is a wasteful number, since it uses less digits than its factorization.

9656896640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15088920 (or 15088908 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 59.

The square root of 9656896640 is about 98269.5102257053. The cubic root of 9656896640 is about 2129.5075999628.

The spelling of 9656896640 in words is "nine billion, six hundred fifty-six million, eight hundred ninety-six thousand, six hundred forty".