85540170847 has 4 divisors (see below), whose sum is σ = 85586137336. Its totient is φ = 85494204360.

The previous prime is 85540170839. The next prime is 85540170887. The reversal of 85540170847 is 74807104558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85540170847 - 2³ = 85540170839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85540170847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85540170887) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22980453 + ... + 22984174.

It is an arithmetic number, because the mean of its divisors is an integer number (21396534334).

Almost surely, 2^85540170847 is an apocalyptic number.

85540170847 is a deficient number, since it is larger than the sum of its proper divisors (45966489).

85540170847 is a wasteful number, since it uses less digits than its factorization.

85540170847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45966488.

The product of its (nonzero) digits is 1254400, while the sum is 49.

The spelling of 85540170847 in words is "eighty-five billion, five hundred forty million, one hundred seventy thousand, eight hundred forty-seven".