9849721065 has 16 divisors (see below), whose sum is σ = 15760910400. Its totient is φ = 5252732352.

The previous prime is 9849721033. The next prime is 9849721081. The reversal of 9849721065 is 5601279489.

It is not a de Polignac number, because 9849721065 - 2⁵ = 9849721033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9849720999 and 9849721017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224991 + ... + 265179.

It is an arithmetic number, because the mean of its divisors is an integer number (985056900).

Almost surely, 2^9849721065 is an apocalyptic number.

It is an amenable number.

9849721065 is a deficient number, since it is larger than the sum of its proper divisors (5911189335).

9849721065 is a wasteful number, since it uses less digits than its factorization.

9849721065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56536.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 9849721065 is about 99245.7609422186. The cubic root of 9849721065 is about 2143.5879677163.

The spelling of 9849721065 in words is "nine billion, eight hundred forty-nine million, seven hundred twenty-one thousand, sixty-five".