85171140236 has 36 divisors (see below), whose sum is σ = 184453485552. Its totient is φ = 33694075584.

The previous prime is 85171140227. The next prime is 85171140239. The reversal of 85171140236 is 63204117158.

It is a self number, because there is not a number n which added to its sum of digits gives 85171140236.

It is not an unprimeable number, because it can be changed into a prime (85171140239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8994755 + ... + 9004218.

It is an arithmetic number, because the mean of its divisors is an integer number (5123707932).

Almost surely, 2^85171140236 is an apocalyptic number.

It is an amenable number.

85171140236 is an abundant number, since it is smaller than the sum of its proper divisors (99282345316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85171140236 is a wasteful number, since it uses less digits than its factorization.

85171140236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17999010 (or 17998995 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 85171140236 in words is "eighty-five billion, one hundred seventy-one million, one hundred forty thousand, two hundred thirty-six".