168685427664 has 100 divisors (see below), whose sum is σ = 525780355716. Its totient is φ = 51903203328.

The previous prime is 168685427641. The next prime is 168685427671. The reversal of 168685427664 is 466724586861.

It is a happy number.

168685427664 is a `hidden beast` number, since 1 + 6 + 86 + 8 + 542 + 7 + 6 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18498176064 + 150187251600 = 136008^2 + 387540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4989249 + ... + 5022944.

Almost surely, 2^168685427664 is an apocalyptic number.

It is an amenable number.

168685427664 is an abundant number, since it is smaller than the sum of its proper divisors (357094928052).

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

168685427664 is a wasteful number, since it uses less digits than its factorization.

168685427664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012226 (or 10012211 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 168685427664 in words is "one hundred sixty-eight billion, six hundred eighty-five million, four hundred twenty-seven thousand, six hundred sixty-four".