168121453377936 has 80 divisors (see below), whose sum is σ = 435801352821120. Its totient is φ = 55848611650560.

The previous prime is 168121453377929. The next prime is 168121453377937. The reversal of 168121453377936 is 639773354121861.

168121453377936 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 not an unprimeable number, because it can be changed into a prime (168121453377937) 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, 70375050 + ... + 72724758.

It is an arithmetic number, because the mean of its divisors is an integer number (5447516910264).

Almost surely, 2^{168121453377936} is an apocalyptic number.

168121453377936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

168121453377936 is an abundant number, since it is smaller than the sum of its proper divisors (267679899443184).

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

168121453377936 is a wasteful number, since it uses less digits than its factorization.

168121453377936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354824 (or 2354818 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 66.

The spelling of 168121453377936 in words is "one hundred sixty-eight trillion, one hundred twenty-one billion, four hundred fifty-three million, three hundred seventy-seven thousand, nine hundred thirty-six".