9841994217649 has 8 divisors (see below), whose sum is σ = 10737483306048. Its totient is φ = 8946632186160.

The previous prime is 9841994217623. The next prime is 9841994217659. The reversal of 9841994217649 is 9467124991489.

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

It is a cyclic number.

It is not a de Polignac number, because 9841994217649 - 2²³ = 9841985829041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9841994217659) 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, 31602222 + ... + 31912135.

It is an arithmetic number, because the mean of its divisors is an integer number (1342185413256).

Almost surely, 2^{9841994217649} is an apocalyptic number.

It is an amenable number.

9841994217649 is a deficient number, since it is larger than the sum of its proper divisors (895489088399).

9841994217649 is a wasteful number, since it uses less digits than its factorization.

9841994217649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63528455.

The product of its digits is 282175488, while the sum is 73.

The spelling of 9841994217649 in words is "nine trillion, eight hundred forty-one billion, nine hundred ninety-four million, two hundred seventeen thousand, six hundred forty-nine".