168171818080 has 288 divisors, whose sum is σ = 489826764000. Its totient is φ = 54250463232.

The previous prime is 168171818069. The next prime is 168171818149. The reversal of 168171818080 is 80818171861.

It is a super-2 number, since 2×168171818080² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 22191252 + ... + 22198828.

It is an arithmetic number, because the mean of its divisors is an integer number (1700787375).

Almost surely, 2^168171818080 is an apocalyptic number.

168171818080 is a gapful number since it is divisible by the number (10) 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 168171818080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244913382000).

168171818080 is an abundant number, since it is smaller than the sum of its proper divisors (321654945920).

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

168171818080 is a wasteful number, since it uses less digits than its factorization.

168171818080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7774 (or 7759 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 49.

The spelling of 168171818080 in words is "one hundred sixty-eight billion, one hundred seventy-one million, eight hundred eighteen thousand, eighty".