85900139585 has 12 divisors (see below), whose sum is σ = 111012464892. Its totient is φ = 63432204288.

The previous prime is 85900139573. The next prime is 85900139659. The reversal of 85900139585 is 58593100958.

It can be written as a sum of positive squares in 6 ways, for example, as 18877660816 + 67022478769 = 137396^2 + 258887^2 .

It is not a de Polignac number, because 85900139585 - 2⁴ = 85900139569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2344769 + ... + 2381121.

It is an arithmetic number, because the mean of its divisors is an integer number (9251038741).

Almost surely, 2^85900139585 is an apocalyptic number.

It is an amenable number.

85900139585 is a deficient number, since it is larger than the sum of its proper divisors (25112325307).

85900139585 is an frugal number, since it uses more digits than its factorization.

85900139585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72724 (or 36371 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 85900139585 in words is "eighty-five billion, nine hundred million, one hundred thirty-nine thousand, five hundred eighty-five".