168683973445 has 8 divisors (see below), whose sum is σ = 217991596536. Its totient is φ = 124566626496.

The previous prime is 168683973439. The next prime is 168683973449. The reversal of 168683973445 is 544379386861.

It can be written as a sum of positive squares in 4 ways, for example, as 13447185444 + 155236788001 = 115962^2 + 394001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168683973445 - 2⁷ = 168683973317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168683973449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297568962 + ... + 1297569091.

It is an arithmetic number, because the mean of its divisors is an integer number (27248949567).

Almost surely, 2^168683973445 is an apocalyptic number.

It is an amenable number.

168683973445 is a deficient number, since it is larger than the sum of its proper divisors (49307623091).

168683973445 is a wasteful number, since it uses less digits than its factorization.

168683973445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595138071.

The product of its digits is 104509440, while the sum is 64.

The spelling of 168683973445 in words is "one hundred sixty-eight billion, six hundred eighty-three million, nine hundred seventy-three thousand, four hundred forty-five".