168705772705 has 32 divisors (see below), whose sum is σ = 218154787200. Its totient is φ = 124859750400.

The previous prime is 168705772687. The next prime is 168705772811. The reversal of 168705772705 is 507277507861.

168705772705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-168705772705 is a prime.

It is a super-2 number, since 2×168705772705² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 31 ways as a sum of consecutive naturals, for example, 700785 + ... + 910225.

It is an arithmetic number, because the mean of its divisors is an integer number (6817337100).

Almost surely, 2^168705772705 is an apocalyptic number.

It is an amenable number.

168705772705 is a deficient number, since it is larger than the sum of its proper divisors (49449014495).

168705772705 is a wasteful number, since it uses less digits than its factorization.

168705772705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209665.

The product of its (nonzero) digits is 5762400, while the sum is 55.

The spelling of 168705772705 in words is "one hundred sixty-eight billion, seven hundred five million, seven hundred seventy-two thousand, seven hundred five".