981240116168 has 64 divisors (see below), whose sum is σ = 2025627413040. Its totient is φ = 442817915904.

The previous prime is 981240116167. The next prime is 981240116177. The reversal of 981240116168 is 861611042189.

It can be written as a sum of positive squares in 8 ways, for example, as 907526780164 + 73713336004 = 952642^2 + 271502^2 .

It is not an unprimeable number, because it can be changed into a prime (981240116167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1311230 + ... + 1918802.

Almost surely, 2^981240116168 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 981240116168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012813706520).

981240116168 is an abundant number, since it is smaller than the sum of its proper divisors (1044387296872).

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

981240116168 is a wasteful number, since it uses less digits than its factorization.

981240116168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607938 (or 607934 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The spelling of 981240116168 in words is "nine hundred eighty-one billion, two hundred forty million, one hundred sixteen thousand, one hundred sixty-eight".