85386038609 has 4 divisors (see below), whose sum is σ = 85397916516. Its totient is φ = 85374160704.

The previous prime is 85386038519. The next prime is 85386038663. The reversal of 85386038609 is 90683068358.

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 17557045009 + 67828993600 = 132503^2 + 260440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85386038609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85386032609) 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, 5928164 + ... + 5942549.

It is an arithmetic number, because the mean of its divisors is an integer number (21349479129).

Almost surely, 2^85386038609 is an apocalyptic number.

It is an amenable number.

85386038609 is a deficient number, since it is larger than the sum of its proper divisors (11877907).

85386038609 is a wasteful number, since it uses less digits than its factorization.

85386038609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11877906.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 85386038609 in words is "eighty-five billion, three hundred eighty-six million, thirty-eight thousand, six hundred nine".