861086716 has 24 divisors (see below), whose sum is σ = 1729706720. Its totient is φ = 367422912.

The previous prime is 861086693. The next prime is 861086741. The reversal of 861086716 is 617680168.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60735 + ... + 73558.

Almost surely, 2^861086716 is an apocalyptic number.

It is an amenable number.

861086716 is an abundant number, since it is smaller than the sum of its proper divisors (868620004).

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

861086716 is a wasteful number, since it uses less digits than its factorization.

861086716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134533 (or 134531 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 861086716 is about 29344.2791017261. The cubic root of 861086716 is about 951.3689280286.

The spelling of 861086716 in words is "eight hundred sixty-one million, eighty-six thousand, seven hundred sixteen".