168517905684 has 12 divisors (see below), whose sum is σ = 393208446624. Its totient is φ = 56172635224.

The previous prime is 168517905631. The next prime is 168517905691. The reversal of 168517905684 is 486509715861.

168517905684 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 (12).

It is a super-2 number, since 2×168517905684² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7021579392 + ... + 7021579415.

It is an arithmetic number, because the mean of its divisors is an integer number (32767370552).

Almost surely, 2^168517905684 is an apocalyptic number.

It is an amenable number.

168517905684 is an abundant number, since it is smaller than the sum of its proper divisors (224690540940).

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

168517905684 is a wasteful number, since it uses less digits than its factorization.

168517905684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14043158814 (or 14043158812 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 168517905684 in words is "one hundred sixty-eight billion, five hundred seventeen million, nine hundred five thousand, six hundred eighty-four".