855560916 has 144 divisors (see below), whose sum is σ = 2569432320. Its totient is φ = 234938880.

The previous prime is 855560851. The next prime is 855560933. The reversal of 855560916 is 619065558.

It is a happy number.

855560916 is a `hidden beast` number, since 8 + 5 + 556 + 0 + 91 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 829321 + ... + 830351.

It is an arithmetic number, because the mean of its divisors is an integer number (17843280).

Almost surely, 2^855560916 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 855560916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284716160).

855560916 is an abundant number, since it is smaller than the sum of its proper divisors (1713871404).

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

855560916 is a wasteful number, since it uses less digits than its factorization.

855560916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 855560916 is about 29249.9729230644. The cubic root of 855560916 is about 949.3295050954.

It can be divided in two parts, 8555609 and 16, that added together give a square (8555625 = 2925²).

The spelling of 855560916 in words is "eight hundred fifty-five million, five hundred sixty thousand, nine hundred sixteen".