9659720964 has 48 divisors (see below), whose sum is σ = 23532687360. Its totient is φ = 3078160800.

The previous prime is 9659720963. The next prime is 9659721007. The reversal of 9659720964 is 4690279569.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9659720963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529507 + ... + 547445.

It is an arithmetic number, because the mean of its divisors is an integer number (490264320).

Almost surely, 2^9659720964 is an apocalyptic number.

It is an amenable number.

9659720964 is an abundant number, since it is smaller than the sum of its proper divisors (13872966396).

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

9659720964 is a wasteful number, since it uses less digits than its factorization.

9659720964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19920 (or 19918 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 57.

The square root of 9659720964 is about 98283.8794716611. The cubic root of 9659720964 is about 2129.7151833236.

The spelling of 9659720964 in words is "nine billion, six hundred fifty-nine million, seven hundred twenty thousand, nine hundred sixty-four".