9720204065 has 48 divisors (see below), whose sum is σ = 13930724304. Its totient is φ = 6467112960.

The previous prime is 9720204059. The next prime is 9720204073. The reversal of 9720204065 is 5604020279.

It can be written as a sum of positive squares in 8 ways, for example, as 876870544 + 8843333521 = 29612^2 + 94039^2 .

It is not a de Polignac number, because 9720204065 - 2¹⁰ = 9720203041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 883277 + ... + 894213.

It is an arithmetic number, because the mean of its divisors is an integer number (290223423).

Almost surely, 2^9720204065 is an apocalyptic number.

It is an amenable number.

9720204065 is a deficient number, since it is larger than the sum of its proper divisors (4210520239).

9720204065 is a wasteful number, since it uses less digits than its factorization.

9720204065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090 (or 11079 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 9720204065 is about 98591.0952621990. The cubic root of 9720204065 is about 2134.1509175161.

The spelling of 9720204065 in words is "nine billion, seven hundred twenty million, two hundred four thousand, sixty-five".