9645455556 has 72 divisors (see below), whose sum is σ = 27316982784. Its totient is φ = 2843864640.

The previous prime is 9645455551. The next prime is 9645455557. The reversal of 9645455556 is 6555545469.

It is a happy number.

9645455556 is a `hidden beast` number, since 9 + 6 + 45 + 45 + 5 + 556 = 666.

It is not an unprimeable number, because it can be changed into a prime (9645455551) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 314500 + ... + 343803.

Almost surely, 2^9645455556 is an apocalyptic number.

It is an amenable number.

9645455556 is an abundant number, since it is smaller than the sum of its proper divisors (17671527228).

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

9645455556 is a wasteful number, since it uses less digits than its factorization.

9645455556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658361 (or 658356 counting only the distinct ones).

The product of its digits is 16200000, while the sum is 54.

The square root of 9645455556 is about 98211.2801871557. The cubic root of 9645455556 is about 2128.6662840156. Note that the first 3 decimals are identical.

The spelling of 9645455556 in words is "nine billion, six hundred forty-five million, four hundred fifty-five thousand, five hundred fifty-six".