168538735020880 has 80 divisors (see below), whose sum is σ = 452863310607360. Its totient is φ = 57135442738176.

The previous prime is 168538735020763. The next prime is 168538735020881. The reversal of 168538735020880 is 88020537835861.

168538735020880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168538735020881) 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, 1690748064 + ... + 1690847743.

It is an arithmetic number, because the mean of its divisors is an integer number (5660791382592).

Almost surely, 2^{168538735020880} is an apocalyptic number.

168538735020880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168538735020880 is an abundant number, since it is smaller than the sum of its proper divisors (284324575586480).

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

168538735020880 is a wasteful number, since it uses less digits than its factorization.

168538735020880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381595916 (or 3381595910 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 168538735020880 in words is "one hundred sixty-eight trillion, five hundred thirty-eight billion, seven hundred thirty-five million, twenty thousand, eight hundred eighty".