9869863694544 has 240 divisors, whose sum is σ = 32605049651200. Its totient is φ = 2727417381120.

The previous prime is 9869863694531. The next prime is 9869863694549. The reversal of 9869863694544 is 4454963689689.

9869863694544 is a `hidden beast` number, since 9 + 8 + 6 + 9 + 8 + 6 + 3 + 69 + 4 + 544 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9869863694549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54499857 + ... + 54680655.

Almost surely, 2^{9869863694544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9869863694544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16302524825600).

9869863694544 is an abundant number, since it is smaller than the sum of its proper divisors (22735185956656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9869863694544 is a wasteful number, since it uses less digits than its factorization.

9869863694544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182598 (or 182589 counting only the distinct ones).

The product of its digits is 9674588160, while the sum is 81.

The spelling of 9869863694544 in words is "nine trillion, eight hundred sixty-nine billion, eight hundred sixty-three million, six hundred ninety-four thousand, five hundred forty-four".