9665641201473 has 12 divisors (see below), whose sum is σ = 13984712162148. Its totient is φ = 6433039065600.

The previous prime is 9665641201459. The next prime is 9665641201499. The reversal of 9665641201473 is 3741021465669.

It is a happy number.

9665641201473 is a `hidden beast` number, since 9 + 6 + 6 + 564 + 1 + 2 + 0 + 1 + 4 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7601396385969 + 2064244815504 = 2757063^2 + 1436748^2 .

It is not a de Polignac number, because 9665641201473 - 2⁶ = 9665641201409 is a prime.

It is a super-2 number, since 2×9665641201473² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9665641201423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 893472240 + ... + 893483057.

It is an arithmetic number, because the mean of its divisors is an integer number (1165392680179).

Almost surely, 2^{9665641201473} is an apocalyptic number.

It is an amenable number.

9665641201473 is a deficient number, since it is larger than the sum of its proper divisors (4319070960675).

9665641201473 is a wasteful number, since it uses less digits than its factorization.

9665641201473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786955904 (or 1786955901 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 9665641201473 in words is "nine trillion, six hundred sixty-five billion, six hundred forty-one million, two hundred one thousand, four hundred seventy-three".