8265711861 has 12 divisors (see below), whose sum is σ = 13024758240. Its totient is φ = 5009522280.

The previous prime is 8265711859. The next prime is 8265711869. The reversal of 8265711861 is 1681175628.

8265711861 is a `hidden beast` number, since 8 + 2 + 6 + 571 + 18 + 61 = 666.

It is not a de Polignac number, because 8265711861 - 2¹ = 8265711859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8265711869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41745921 + ... + 41746118.

It is an arithmetic number, because the mean of its divisors is an integer number (1085396520).

Almost surely, 2^8265711861 is an apocalyptic number.

It is an amenable number.

8265711861 is a deficient number, since it is larger than the sum of its proper divisors (4759046379).

8265711861 is a wasteful number, since it uses less digits than its factorization.

8265711861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83492056 (or 83492053 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 8265711861 is about 90915.9604304987. The cubic root of 8265711861 is about 2021.9019322453.

The spelling of 8265711861 in words is "eight billion, two hundred sixty-five million, seven hundred eleven thousand, eight hundred sixty-one".