9661810645069 has 8 divisors (see below), whose sum is σ = 10540191967200. Its totient is φ = 8783435139600.

The previous prime is 9661810645057. The next prime is 9661810645087. The reversal of 9661810645069 is 9605460181669.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9661810645069 - 2³⁵ = 9627450906701 is a prime.

It is a super-3 number, since 3×9661810645069³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9661810644998 and 9661810645016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661810645009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2482279 + ... + 5048299.

It is an arithmetic number, because the mean of its divisors is an integer number (1317523995900).

Almost surely, 2^{9661810645069} is an apocalyptic number.

It is an amenable number.

9661810645069 is a deficient number, since it is larger than the sum of its proper divisors (878381322131).

9661810645069 is a wasteful number, since it uses less digits than its factorization.

9661810645069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908331.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 9661810645069 in words is "nine trillion, six hundred sixty-one billion, eight hundred ten million, six hundred forty-five thousand, sixty-nine".