9641573817 has 16 divisors (see below), whose sum is σ = 13943627712. Its totient is φ = 5902062080.

The previous prime is 9641573771. The next prime is 9641573833. The reversal of 9641573817 is 7183751469.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9641573817 - 2¹⁰ = 9641572793 is a prime.

It is a super-4 number, since 4×9641573817⁴ (a number of 41 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 9641573817.

It is not an unprimeable number, because it can be changed into a prime (9641573857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2303403 + ... + 2307584.

It is an arithmetic number, because the mean of its divisors is an integer number (871476732).

Almost surely, 2^9641573817 is an apocalyptic number.

It is an amenable number.

9641573817 is a deficient number, since it is larger than the sum of its proper divisors (4302053895).

9641573817 is a wasteful number, since it uses less digits than its factorization.

9641573817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611048.

The product of its digits is 1270080, while the sum is 51.

The square root of 9641573817 is about 98191.5160133502. The cubic root of 9641573817 is about 2128.3806906056.

The spelling of 9641573817 in words is "nine billion, six hundred forty-one million, five hundred seventy-three thousand, eight hundred seventeen".