861086100186 has 24 divisors (see below), whose sum is σ = 2009200900980. Its totient is φ = 264949569216.

The previous prime is 861086100181. The next prime is 861086100191. The reversal of 861086100186 is 681001680168.

861086100186 is a `hidden beast` number, since 8 + 6 + 10 + 8 + 610 + 0 + 18 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (861086100181) and next prime (861086100191).

It can be written as a sum of positive squares in 2 ways, for example, as 844735619025 + 16350481161 = 919095^2 + 127869^2 .

It is not an unprimeable number, because it can be changed into a prime (861086100181) 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, 1839927331 + ... + 1839927798.

Almost surely, 2^861086100186 is an apocalyptic number.

861086100186 is an abundant number, since it is smaller than the sum of its proper divisors (1148114800794).

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

861086100186 is a wasteful number, since it uses less digits than its factorization.

861086100186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679855150 (or 3679855147 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 861086100186 in words is "eight hundred sixty-one billion, eighty-six million, one hundred thousand, one hundred eighty-six".