84166835085 has 24 divisors (see below), whose sum is σ = 145910530584. Its totient is φ = 44882409600.

The previous prime is 84166835069. The next prime is 84166835257. The reversal of 84166835085 is 58053866148.

It can be written as a sum of positive squares in 4 ways, for example, as 18959637636 + 65207197449 = 137694^2 + 255357^2 .

It is not a de Polignac number, because 84166835085 - 2⁴ = 84166835069 is a prime.

It is a super-2 number, since 2×84166835085² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182235 + ... + 448935.

It is an arithmetic number, because the mean of its divisors is an integer number (6079605441).

Almost surely, 2^84166835085 is an apocalyptic number.

It is an amenable number.

84166835085 is a deficient number, since it is larger than the sum of its proper divisors (61743695499).

84166835085 is a wasteful number, since it uses less digits than its factorization.

84166835085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273725 (or 273722 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 84166835085 in words is "eighty-four billion, one hundred sixty-six million, eight hundred thirty-five thousand, eighty-five".