168351841685 has 16 divisors (see below), whose sum is σ = 205058198592. Its totient is φ = 132657888000.

The previous prime is 168351841633. The next prime is 168351841729. The reversal of 168351841685 is 586148153861.

It is a de Polignac number, because none of the positive numbers 2^k-168351841685 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168351841685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4487405 + ... + 4524765.

It is an arithmetic number, because the mean of its divisors is an integer number (12816137412).

Almost surely, 2^168351841685 is an apocalyptic number.

It is an amenable number.

168351841685 is a deficient number, since it is larger than the sum of its proper divisors (36706356907).

168351841685 is a wasteful number, since it uses less digits than its factorization.

168351841685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50884.

The product of its digits is 5529600, while the sum is 56.

The spelling of 168351841685 in words is "one hundred sixty-eight billion, three hundred fifty-one million, eight hundred forty-one thousand, six hundred eighty-five".