85809678185 has 32 divisors (see below), whose sum is σ = 132521508864. Its totient is φ = 51766200000.

The previous prime is 85809678067. The next prime is 85809678191. The reversal of 85809678185 is 58187690858.

It is not a de Polignac number, because 85809678185 - 2²⁴ = 85792900969 is a prime.

It is a Duffinian 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 31 ways as a sum of consecutive naturals, for example, 3582941 + ... + 3606810.

It is an arithmetic number, because the mean of its divisors is an integer number (4141297152).

Almost surely, 2^85809678185 is an apocalyptic number.

It is an amenable number.

85809678185 is a deficient number, since it is larger than the sum of its proper divisors (46711830679).

85809678185 is a wasteful number, since it uses less digits than its factorization.

85809678185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189805.

The product of its (nonzero) digits is 38707200, while the sum is 65.

The spelling of 85809678185 in words is "eighty-five billion, eight hundred nine million, six hundred seventy-eight thousand, one hundred eighty-five".