85881471570818 has 72 divisors (see below), whose sum is σ = 165726529634736. Its totient is φ = 33255034853040.

The previous prime is 85881471570733. The next prime is 85881471570821. The reversal of 85881471570818 is 81807517418858.

It is a happy 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 35 ways as a sum of consecutive naturals, for example, 20283380 + ... + 24149087.

It is an arithmetic number, because the mean of its divisors is an integer number (2301757356038).

Almost surely, 2^{85881471570818} is an apocalyptic number.

85881471570818 is a deficient number, since it is larger than the sum of its proper divisors (79845058063918).

85881471570818 is a wasteful number, since it uses less digits than its factorization.

85881471570818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44432668 (or 44432650 counting only the distinct ones).

The product of its (nonzero) digits is 160563200, while the sum is 71.

The spelling of 85881471570818 in words is "eighty-five trillion, eight hundred eighty-one billion, four hundred seventy-one million, five hundred seventy thousand, eight hundred eighteen".