168388123240 has 64 divisors (see below), whose sum is σ = 401510338560. Its totient is φ = 63337804800.

The previous prime is 168388123229. The next prime is 168388123247. The reversal of 168388123240 is 42321883861.

It is not an unprimeable number, because it can be changed into a prime (168388123247) 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, 675109 + ... + 890251.

It is an arithmetic number, because the mean of its divisors is an integer number (6273599040).

Almost surely, 2^168388123240 is an apocalyptic number.

168388123240 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 168388123240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200755169280).

168388123240 is an abundant number, since it is smaller than the sum of its proper divisors (233122215320).

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

168388123240 is a wasteful number, since it uses less digits than its factorization.

168388123240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216322 (or 216318 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 168388123240 in words is "one hundred sixty-eight billion, three hundred eighty-eight million, one hundred twenty-three thousand, two hundred forty".