85851356221 has 8 divisors (see below), whose sum is σ = 85935075200. Its totient is φ = 85767676848.

The previous prime is 85851356219. The next prime is 85851356233. The reversal of 85851356221 is 12265315858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85851356221 - 2¹ = 85851356219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85851356281) 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 7 ways as a sum of consecutive naturals, for example, 5951800 + ... + 5966206.

It is an arithmetic number, because the mean of its divisors is an integer number (10741884400).

Almost surely, 2^85851356221 is an apocalyptic number.

It is an amenable number.

85851356221 is a deficient number, since it is larger than the sum of its proper divisors (83718979).

85851356221 is a wasteful number, since it uses less digits than its factorization.

85851356221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19803.

The product of its digits is 576000, while the sum is 46.

The spelling of 85851356221 in words is "eighty-five billion, eight hundred fifty-one million, three hundred fifty-six thousand, two hundred twenty-one".