8385571389944 has 128 divisors (see below), whose sum is σ = 18995414630400. Its totient is φ = 3394059701760.

The previous prime is 8385571389917. The next prime is 8385571389961. The reversal of 8385571389944 is 4499831755838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132855497 + ... + 132918599.

It is an arithmetic number, because the mean of its divisors is an integer number (148401676800).

Almost surely, 2^{8385571389944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8385571389944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9497707315200).

8385571389944 is an abundant number, since it is smaller than the sum of its proper divisors (10609843240456).

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

8385571389944 is a wasteful number, since it uses less digits than its factorization.

8385571389944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64933 (or 64929 counting only the distinct ones).

The product of its digits is 1045094400, while the sum is 74.

The spelling of 8385571389944 in words is "eight trillion, three hundred eighty-five billion, five hundred seventy-one million, three hundred eighty-nine thousand, nine hundred forty-four".