168955981824 has 416 divisors, whose sum is σ = 550393262080. Its totient is φ = 45020676096.

The previous prime is 168955981823. The next prime is 168955981829. The reversal of 168955981824 is 428189559861.

It is a super-2 number, since 2×168955981824² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168955981823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109497597 + ... + 109499139.

Almost surely, 2^168955981824 is an apocalyptic number.

168955981824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168955981824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275196631040).

168955981824 is an abundant number, since it is smaller than the sum of its proper divisors (381437280256).

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

168955981824 is a wasteful number, since it uses less digits than its factorization.

168955981824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663 (or 1641 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 66.

The spelling of 168955981824 in words is "one hundred sixty-eight billion, nine hundred fifty-five million, nine hundred eighty-one thousand, eight hundred twenty-four".