9861117896 has 48 divisors (see below), whose sum is σ = 21603250800. Its totient is φ = 4207537824.

The previous prime is 9861117881. The next prime is 9861117899. The reversal of 9861117896 is 6987111689.

9861117896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9861117896² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (9861117899) 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 11 ways as a sum of consecutive naturals, for example, 33575 + ... + 144393.

It is an arithmetic number, because the mean of its divisors is an integer number (450067725).

Almost surely, 2^9861117896 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 9861117896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10801625400).

9861117896 is an abundant number, since it is smaller than the sum of its proper divisors (11742132904).

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

9861117896 is a wasteful number, since it uses less digits than its factorization.

9861117896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111066 (or 111055 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 56.

The square root of 9861117896 is about 99303.1615609493. The cubic root of 9861117896 is about 2144.4144105239.

The spelling of 9861117896 in words is "nine billion, eight hundred sixty-one million, one hundred seventeen thousand, eight hundred ninety-six".