168720730878336 has 1024 divisors, whose sum is σ = 597543561216000. Its totient is φ = 40948582219776.

The previous prime is 168720730878331. The next prime is 168720730878341. The reversal of 168720730878336 is 633878037027861.

168720730878336 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (168720730878331) and next prime (168720730878341).

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168720730878331) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6596051595 + ... + 6596077173.

It is an arithmetic number, because the mean of its divisors is an integer number (583538634000).

Almost surely, 2^{168720730878336} is an apocalyptic number.

168720730878336 is a gapful number since it is divisible by the number (16) 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 168720730878336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298771780608000).

168720730878336 is an abundant number, since it is smaller than the sum of its proper divisors (428822830337664).

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

168720730878336 is a wasteful number, since it uses less digits than its factorization.

168720730878336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25951 (or 25939 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 69.

The spelling of 168720730878336 in words is "one hundred sixty-eight trillion, seven hundred twenty billion, seven hundred thirty million, eight hundred seventy-eight thousand, three hundred thirty-six".