84861180709 has 4 divisors (see below), whose sum is σ = 86462335116. Its totient is φ = 83260026304.

The previous prime is 84861180707. The next prime is 84861180731. The reversal of 84861180709 is 90708116848.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76132950084 + 8728230625 = 275922^2 + 93425^2 .

It is a cyclic number.

It is not a de Polignac number, because 84861180709 - 2¹ = 84861180707 is a prime.

It is a super-3 number, since 3×84861180709³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84861180707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800577124 + ... + 800577229.

It is an arithmetic number, because the mean of its divisors is an integer number (21615583779).

Almost surely, 2^84861180709 is an apocalyptic number.

It is an amenable number.

84861180709 is a deficient number, since it is larger than the sum of its proper divisors (1601154407).

84861180709 is a wasteful number, since it uses less digits than its factorization.

84861180709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601154406.

The product of its (nonzero) digits is 774144, while the sum is 52.

The spelling of 84861180709 in words is "eighty-four billion, eight hundred sixty-one million, one hundred eighty thousand, seven hundred nine".