85437806005 has 8 divisors (see below), whose sum is σ = 102562788024. Its totient is φ = 68325297600.

The previous prime is 85437805969. The next prime is 85437806057. The reversal of 85437806005 is 50060873458.

It can be written as a sum of positive squares in 4 ways, for example, as 13280027121 + 72157778884 = 115239^2 + 268622^2 .

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

It is not a de Polignac number, because 85437806005 - 2³³ = 76847871413 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 3103326 + ... + 3130735.

It is an arithmetic number, because the mean of its divisors is an integer number (12820348503).

Almost surely, 2^85437806005 is an apocalyptic number.

It is an amenable number.

85437806005 is a deficient number, since it is larger than the sum of its proper divisors (17124982019).

85437806005 is a wasteful number, since it uses less digits than its factorization.

85437806005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236807.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 85437806005 in words is "eighty-five billion, four hundred thirty-seven million, eight hundred six thousand, five".