9838834448781 has 16 divisors (see below), whose sum is σ = 14127614943680. Its totient is φ = 6054642587520.

The previous prime is 9838834448701. The next prime is 9838834448783. The reversal of 9838834448781 is 1878444388389.

It is not a de Polignac number, because 9838834448781 - 2²⁷ = 9838700231053 is a prime.

It is a super-2 number, since 2×9838834448781² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9838834448783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15202641 + ... + 15836601.

It is an arithmetic number, because the mean of its divisors is an integer number (882975933980).

Almost surely, 2^{9838834448781} is an apocalyptic number.

It is an amenable number.

9838834448781 is a deficient number, since it is larger than the sum of its proper divisors (4288780494899).

9838834448781 is a wasteful number, since it uses less digits than its factorization.

9838834448781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031916.

The product of its digits is 1189085184, while the sum is 75.

The spelling of 9838834448781 in words is "nine trillion, eight hundred thirty-eight billion, eight hundred thirty-four million, four hundred forty-eight thousand, seven hundred eighty-one".