9647809956 has 36 divisors (see below), whose sum is σ = 25174216704. Its totient is φ = 3112196400.

The previous prime is 9647809933. The next prime is 9647809957. The reversal of 9647809956 is 6599087469.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 9647809893 and 9647809902.

It is not an unprimeable number, because it can be changed into a prime (9647809957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4321380 + ... + 4323611.

Almost surely, 2^9647809956 is an apocalyptic number.

It is an amenable number.

9647809956 is an abundant number, since it is smaller than the sum of its proper divisors (15526406748).

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

9647809956 is a wasteful number, since it uses less digits than its factorization.

9647809956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645032 (or 8645027 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The square root of 9647809956 is about 98223.2658589603. The cubic root of 9647809956 is about 2128.8394683077.

The spelling of 9647809956 in words is "nine billion, six hundred forty-seven million, eight hundred nine thousand, nine hundred fifty-six".