9894644109 has 24 divisors (see below), whose sum is σ = 16337152832. Its totient is φ = 5652996480.

The previous prime is 9894644101. The next prime is 9894644119. The reversal of 9894644109 is 9014464989.

It is a happy number.

It is not a de Polignac number, because 9894644109 - 2³ = 9894644101 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9894644101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 409797 + ... + 433269.

Almost surely, 2^9894644109 is an apocalyptic number.

It is an amenable number.

9894644109 is a deficient number, since it is larger than the sum of its proper divisors (6442508723).

9894644109 is a wasteful number, since it uses less digits than its factorization.

9894644109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30177 (or 30174 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 9894644109 is about 99471.8257045682. The cubic root of 9894644109 is about 2146.8418828272.

The spelling of 9894644109 in words is "nine billion, eight hundred ninety-four million, six hundred forty-four thousand, one hundred nine".