85809665877 has 8 divisors (see below), whose sum is σ = 123213879264. Its totient is φ = 52805948208.

The previous prime is 85809665867. The next prime is 85809665881. The reversal of 85809665877 is 77856690858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85809665877 - 2¹² = 85809661781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85809665807) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1100123883 + ... + 1100123960.

It is an arithmetic number, because the mean of its divisors is an integer number (15401734908).

Almost surely, 2^85809665877 is an apocalyptic number.

It is an amenable number.

85809665877 is a deficient number, since it is larger than the sum of its proper divisors (37404213387).

85809665877 is a wasteful number, since it uses less digits than its factorization.

85809665877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200247859.

The product of its (nonzero) digits is 203212800, while the sum is 69.

The spelling of 85809665877 in words is "eighty-five billion, eight hundred nine million, six hundred sixty-five thousand, eight hundred seventy-seven".