9721009610 has 16 divisors (see below), whose sum is σ = 18843803496. Its totient is φ = 3589295808.

The previous prime is 9721009601. The next prime is 9721009621. The reversal of 9721009610 is 169001279.

9721009610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6847728001 + 2873281609 = 82751^2 + 53603^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37388369 + ... + 37388628.

Almost surely, 2^9721009610 is an apocalyptic number.

9721009610 is a deficient number, since it is larger than the sum of its proper divisors (9122793886).

9721009610 is a wasteful number, since it uses less digits than its factorization.

9721009610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74777017.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 9721009610 is about 98595.1804603044. The cubic root of 9721009610 is about 2134.2098705690.

The spelling of 9721009610 in words is "nine billion, seven hundred twenty-one million, nine thousand, six hundred ten".