9645456656 has 20 divisors (see below), whose sum is σ = 20386988304. Its totient is φ = 4384298400.

The previous prime is 9645456649. The next prime is 9645456679. The reversal of 9645456656 is 6566545469.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27401690 + ... + 27402041.

Almost surely, 2^9645456656 is an apocalyptic number.

It is an amenable number.

9645456656 is an abundant number, since it is smaller than the sum of its proper divisors (10741531648).

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

9645456656 is a wasteful number, since it uses less digits than its factorization.

9645456656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54803750 (or 54803744 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 56.

The square root of 9645456656 is about 98211.2857873269. The cubic root of 9645456656 is about 2128.6663649357. Note that the first 3 decimals are identical.

The spelling of 9645456656 in words is "nine billion, six hundred forty-five million, four hundred fifty-six thousand, six hundred fifty-six".