9720501447605 has 24 divisors (see below), whose sum is σ = 12641112378792. Its totient is φ = 7172412758784.

The previous prime is 9720501447599. The next prime is 9720501447611. The reversal of 9720501447605 is 5067441050279.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9720501447599) and next prime (9720501447611).

It can be written as a sum of positive squares in 12 ways, for example, as 6844387327684 + 2876114119921 = 2616178^2 + 1695911^2 .

It is not a de Polignac number, because 9720501447605 - 2¹⁶ = 9720501382069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3604514 + ... + 5695043.

It is an arithmetic number, because the mean of its divisors is an integer number (526713015783).

Almost surely, 2^{9720501447605} is an apocalyptic number.

It is an amenable number.

9720501447605 is a deficient number, since it is larger than the sum of its proper divisors (2920610931187).

9720501447605 is a wasteful number, since it uses less digits than its factorization.

9720501447605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300825 (or 9300812 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 9720501447605 in words is "nine trillion, seven hundred twenty billion, five hundred one million, four hundred forty-seven thousand, six hundred five".