855873816 has 32 divisors (see below), whose sum is σ = 2445354240. Its totient is φ = 244535328.

The previous prime is 855873793. The next prime is 855873833. The reversal of 855873816 is 618378558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2547076 + ... + 2547411.

It is an arithmetic number, because the mean of its divisors is an integer number (76417320).

Almost surely, 2^855873816 is an apocalyptic number.

It is an amenable number.

855873816 is an abundant number, since it is smaller than the sum of its proper divisors (1589480424).

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

855873816 is a wasteful number, since it uses less digits than its factorization.

855873816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094503 (or 5094499 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The square root of 855873816 is about 29255.3211570135. The cubic root of 855873816 is about 949.4452221615.

The spelling of 855873816 in words is "eight hundred fifty-five million, eight hundred seventy-three thousand, eight hundred sixteen".