168685204992 has 160 divisors (see below), whose sum is σ = 464077320960. Its totient is φ = 54414581760.

The previous prime is 168685204991. The next prime is 168685205033. The reversal of 168685204992 is 299402586861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168685204991) 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, 7187517 + ... + 7210947.

It is an arithmetic number, because the mean of its divisors is an integer number (2900483256).

Almost surely, 2^168685204992 is an apocalyptic number.

168685204992 is a gapful number since it is divisible by the number (12) 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 168685204992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232038660480).

168685204992 is an abundant number, since it is smaller than the sum of its proper divisors (295392115968).

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

168685204992 is a wasteful number, since it uses less digits than its factorization.

168685204992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604 (or 23588 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 168685204992 in words is "one hundred sixty-eight billion, six hundred eighty-five million, two hundred four thousand, nine hundred ninety-two".