9645603372073 has 4 divisors (see below), whose sum is σ = 9906295355140. Its totient is φ = 9384911389008.

The previous prime is 9645603372059. The next prime is 9645603372079. The reversal of 9645603372073 is 3702733065469.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3935950469929 + 5709652902144 = 1983923^2 + 2389488^2 .

It is a cyclic number.

It is not a de Polignac number, because 9645603372073 - 2¹³ = 9645603363881 is a prime.

It is a super-2 number, since 2×9645603372073² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9645603372079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130345991478 + ... + 130345991551.

It is an arithmetic number, because the mean of its divisors is an integer number (2476573838785).

Almost surely, 2^{9645603372073} is an apocalyptic number.

It is an amenable number.

9645603372073 is a deficient number, since it is larger than the sum of its proper divisors (260691983067).

9645603372073 is a wasteful number, since it uses less digits than its factorization.

9645603372073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260691983066.

The product of its (nonzero) digits is 17146080, while the sum is 55.

The spelling of 9645603372073 in words is "nine trillion, six hundred forty-five billion, six hundred three million, three hundred seventy-two thousand, seventy-three".