168964804728 has 192 divisors, whose sum is σ = 476918863200. Its totient is φ = 53994885120.

The previous prime is 168964804693. The next prime is 168964804753. The reversal of 168964804728 is 827408469861.

168964804728 is a `hidden beast` number, since 1 + 6 + 8 + 96 + 480 + 47 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78477700 + ... + 78479852.

Almost surely, 2^168964804728 is an apocalyptic number.

168964804728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168964804728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238459431600).

168964804728 is an abundant number, since it is smaller than the sum of its proper divisors (307954058472).

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

168964804728 is a wasteful number, since it uses less digits than its factorization.

168964804728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 168964804728 in words is "one hundred sixty-eight billion, nine hundred sixty-four million, eight hundred four thousand, seven hundred twenty-eight".