168498536544 has 144 divisors (see below), whose sum is σ = 538462989792. Its totient is φ = 49591517184.

The previous prime is 168498536543. The next prime is 168498536561. The reversal of 168498536544 is 445635894861.

168498536544 is a `hidden beast` number, since 1 + 6 + 8 + 4 + 9 + 85 + 3 + 6 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168498536543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 892257 + ... + 1064480.

It is an arithmetic number, because the mean of its divisors is an integer number (3739326318).

Almost surely, 2^168498536544 is an apocalyptic number.

It is an amenable number.

168498536544 is an abundant number, since it is smaller than the sum of its proper divisors (369964453248).

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

168498536544 is a wasteful number, since it uses less digits than its factorization.

168498536544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956789 (or 1956778 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 63.

The spelling of 168498536544 in words is "one hundred sixty-eight billion, four hundred ninety-eight million, five hundred thirty-six thousand, five hundred forty-four".