168255711785 has 32 divisors (see below), whose sum is σ = 233401824000. Its totient is φ = 114057135360.

The previous prime is 168255711779. The next prime is 168255711797. The reversal of 168255711785 is 587117552861.

It is not a de Polignac number, because 168255711785 - 2⁴ = 168255711769 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 168255711785.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1023911 + ... + 1176819.

It is an arithmetic number, because the mean of its divisors is an integer number (7293807000).

Almost surely, 2^168255711785 is an apocalyptic number.

It is an amenable number.

168255711785 is a deficient number, since it is larger than the sum of its proper divisors (65146112215).

168255711785 is a wasteful number, since it uses less digits than its factorization.

168255711785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153281.

The product of its digits is 4704000, while the sum is 56.

The spelling of 168255711785 in words is "one hundred sixty-eight billion, two hundred fifty-five million, seven hundred eleven thousand, seven hundred eighty-five".