8505711786 has 64 divisors (see below), whose sum is σ = 20119881600. Its totient is φ = 2363216640.

The previous prime is 8505711749. The next prime is 8505711821. The reversal of 8505711786 is 6871175058.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 94576 + ... + 161108.

It is an arithmetic number, because the mean of its divisors is an integer number (314373150).

Almost surely, 2^8505711786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8505711786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10059940800).

8505711786 is an abundant number, since it is smaller than the sum of its proper divisors (11614169814).

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

8505711786 is a wasteful number, since it uses less digits than its factorization.

8505711786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66711.

The product of its (nonzero) digits is 470400, while the sum is 48.

The square root of 8505711786 is about 92226.4158796166. The cubic root of 8505711786 is about 2041.2845768485.

The spelling of 8505711786 in words is "eight billion, five hundred five million, seven hundred eleven thousand, seven hundred eighty-six".