9645773321 has 4 divisors (see below), whose sum is σ = 9696274944. Its totient is φ = 9595271700.

The previous prime is 9645773311. The next prime is 9645773329. The reversal of 9645773321 is 1233775469.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9645773321 - 2⁶ = 9645773257 is a prime.

It is a super-3 number, since 3×9645773321³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9645773329) 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, 25250525 + ... + 25250906.

It is an arithmetic number, because the mean of its divisors is an integer number (2424068736).

Almost surely, 2^9645773321 is an apocalyptic number.

It is an amenable number.

9645773321 is a deficient number, since it is larger than the sum of its proper divisors (50501623).

9645773321 is a wasteful number, since it uses less digits than its factorization.

9645773321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50501622.

The product of its digits is 952560, while the sum is 47.

The square root of 9645773321 is about 98212.8979360654. The cubic root of 9645773321 is about 2128.6896597290.

The spelling of 9645773321 in words is "nine billion, six hundred forty-five million, seven hundred seventy-three thousand, three hundred twenty-one".