168680109640 has 64 divisors (see below), whose sum is σ = 433798934400. Its totient is φ = 57826503168.

The previous prime is 168680109583. The next prime is 168680109643. The reversal of 168680109640 is 46901086861.

It is not an unprimeable number, because it can be changed into a prime (168680109643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2809212 + ... + 2868628.

It is an arithmetic number, because the mean of its divisors is an integer number (6778108350).

Almost surely, 2^168680109640 is an apocalyptic number.

168680109640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168680109640 is an abundant number, since it is smaller than the sum of its proper divisors (265118824760).

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

168680109640 is a wasteful number, since it uses less digits than its factorization.

168680109640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69574 (or 69570 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 168680109640 in words is "one hundred sixty-eight billion, six hundred eighty million, one hundred nine thousand, six hundred forty".