68456536164 has 27 divisors (see below), whose sum is σ = 173046879187. Its totient is φ = 22818322104.

The previous prime is 68456536157. The next prime is 68456536189. The reversal of 68456536164 is 46163565486.

The square root of 68456536164 is 261642.

It is a perfect power (a square), and thus also a powerful number.

68456536164 is a `hidden beast` number, since 6 + 8 + 45 + 6 + 536 + 1 + 64 = 666.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68456536164.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1548049 + ... + 1591655.

Almost surely, 2^68456536164 is an apocalyptic number.

68456536164 is the 261642-nd square number.

It is an amenable number.

68456536164 is an abundant number, since it is smaller than the sum of its proper divisors (104590343023).

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

68456536164 is an frugal number, since it uses more digits than its factorization.

68456536164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87224 (or 43612 counting only the distinct ones).

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

The spelling of 68456536164 in words is "sixty-eight billion, four hundred fifty-six million, five hundred thirty-six thousand, one hundred sixty-four".