168749160021018 has 48 divisors (see below), whose sum is σ = 368417063922336. Its totient is φ = 55819898403360.

The previous prime is 168749160021011. The next prime is 168749160021037. The reversal of 168749160021018 is 810120061947861.

168749160021018 is a `hidden beast` number, since 1 + 6 + 8 + 7 + 4 + 9 + 1 + 600 + 2 + 10 + 18 = 666.

It is not an unprimeable number, because it can be changed into a prime (168749160021011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474032380 + ... + 474388232.

It is an arithmetic number, because the mean of its divisors is an integer number (7675355498382).

Almost surely, 2^{168749160021018} is an apocalyptic number.

168749160021018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

168749160021018 is an abundant number, since it is smaller than the sum of its proper divisors (199667903901318).

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

168749160021018 is a wasteful number, since it uses less digits than its factorization.

168749160021018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557099 (or 557096 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 168749160021018 in words is "one hundred sixty-eight trillion, seven hundred forty-nine billion, one hundred sixty million, twenty-one thousand, eighteen".