168516842668 has 6 divisors (see below), whose sum is σ = 294904474676. Its totient is φ = 84258421332.

The previous prime is 168516842621. The next prime is 168516842693. The reversal of 168516842668 is 866248615861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064605330 + ... + 21064605337.

Almost surely, 2^168516842668 is an apocalyptic number.

It is an amenable number.

168516842668 is a deficient number, since it is larger than the sum of its proper divisors (126387632008).

168516842668 is a wasteful number, since it uses less digits than its factorization.

168516842668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42129210671 (or 42129210669 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 61.

The spelling of 168516842668 in words is "one hundred sixty-eight billion, five hundred sixteen million, eight hundred forty-two thousand, six hundred sixty-eight".