168456533328 has 50 divisors (see below), whose sum is σ = 487562084394. Its totient is φ = 56152177344.

The previous prime is 168456533309. The next prime is 168456533341. The reversal of 168456533328 is 823335654861.

168456533328 is a `hidden beast` number, since 1 + 6 + 84 + 5 + 6 + 533 + 3 + 28 = 666.

It can be written as a sum of positive squares in only one way, i.e., 151641705744 + 16814827584 = 389412^2 + 129672^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 64989651 + ... + 64992242.

Almost surely, 2^168456533328 is an apocalyptic number.

168456533328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168456533328 is an abundant number, since it is smaller than the sum of its proper divisors (319105551066).

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

168456533328 is a wasteful number, since it uses less digits than its factorization.

168456533328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129981913 (or 129981898 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The spelling of 168456533328 in words is "one hundred sixty-eight billion, four hundred fifty-six million, five hundred thirty-three thousand, three hundred twenty-eight".