168856698564 has 72 divisors (see below), whose sum is σ = 432853719480. Its totient is φ = 55495114752.

The previous prime is 168856698557. The next prime is 168856698589. The reversal of 168856698564 is 465896658861.

168856698564 is a `hidden beast` number, since 1 + 6 + 8 + 8 + 56 + 6 + 9 + 8 + 564 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18771740100 + 150084958464 = 137010^2 + 387408^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168856698492 and 168856698501.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1056364 + ... + 1205660.

It is an arithmetic number, because the mean of its divisors is an integer number (6011857215).

Almost surely, 2^168856698564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168856698564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216426859740).

168856698564 is an abundant number, since it is smaller than the sum of its proper divisors (263997020916).

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

168856698564 is a wasteful number, since it uses less digits than its factorization.

168856698564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149749 (or 149744 counting only the distinct ones).

The product of its digits is 597196800, while the sum is 72.

The spelling of 168856698564 in words is "one hundred sixty-eight billion, eight hundred fifty-six million, six hundred ninety-eight thousand, five hundred sixty-four".