168318276745920 has 896 divisors, whose sum is σ = 641956764303360. Its totient is φ = 36551100579840.

The previous prime is 168318276745837. The next prime is 168318276745963. The reversal of 168318276745920 is 29547672813861.

It is a super-2 number, since 2×168318276745920² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12626073655 + ... + 12626086985.

It is a 1-persistent number, because it is pandigital, but 2⋅168318276745920 = 336636553491840 is not.

Almost surely, 2^{168318276745920} is an apocalyptic number.

168318276745920 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 168318276745920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320978382151680).

168318276745920 is an abundant number, since it is smaller than the sum of its proper divisors (473638487557440).

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

168318276745920 is a wasteful number, since it uses less digits than its factorization.

168318276745920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14421 (or 14411 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 69.

The spelling of 168318276745920 in words is "one hundred sixty-eight trillion, three hundred eighteen billion, two hundred seventy-six million, seven hundred forty-five thousand, nine hundred twenty".