9889963839942 has 16 divisors (see below), whose sum is σ = 19781872922160. Its totient is φ = 3296330406272.

The previous prime is 9889963839937. The next prime is 9889963839947. The reversal of 9889963839942 is 2499383699889.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9889963839937) and next prime (9889963839947).

It is a super-2 number, since 2×9889963839942² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889963839947) 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 7 ways as a sum of consecutive naturals, for example, 80985663 + ... + 81107690.

It is an arithmetic number, because the mean of its divisors is an integer number (1236367057635).

Almost surely, 2^{9889963839942} is an apocalyptic number.

9889963839942 is an abundant number, since it is smaller than the sum of its proper divisors (9891909082218).

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

9889963839942 is a wasteful number, since it uses less digits than its factorization.

9889963839942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162103527.

The product of its digits is 13060694016, while the sum is 87.

The spelling of 9889963839942 in words is "nine trillion, eight hundred eighty-nine billion, nine hundred sixty-three million, eight hundred thirty-nine thousand, nine hundred forty-two".