855944816 has 40 divisors (see below), whose sum is σ = 1735972224. Its totient is φ = 408070080.

The previous prime is 855944797. The next prime is 855944861. The reversal of 855944816 is 618449558.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118295 + ... + 125321.

Almost surely, 2^855944816 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 855944816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867986112).

855944816 is an abundant number, since it is smaller than the sum of its proper divisors (880027408).

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

855944816 is a wasteful number, since it uses less digits than its factorization.

855944816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7389 (or 7383 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

The square root of 855944816 is about 29256.5345863108. The cubic root of 855944816 is about 949.4714755435.

The spelling of 855944816 in words is "eight hundred fifty-five million, nine hundred forty-four thousand, eight hundred sixteen".