85365609872 has 20 divisors (see below), whose sum is σ = 165403563420. Its totient is φ = 42680819328.

The previous prime is 85365609853. The next prime is 85365609883. The reversal of 85365609872 is 27890656358.

It can be written as a sum of positive squares in 2 ways, for example, as 9991201936 + 75374407936 = 99956^2 + 274544^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268154 + ... + 492582.

It is an arithmetic number, because the mean of its divisors is an integer number (8270178171).

Almost surely, 2^85365609872 is an apocalyptic number.

It is an amenable number.

85365609872 is a deficient number, since it is larger than the sum of its proper divisors (80037953548).

85365609872 is a wasteful number, since it uses less digits than its factorization.

85365609872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248210 (or 248204 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 85365609872 in words is "eighty-five billion, three hundred sixty-five million, six hundred nine thousand, eight hundred seventy-two".