855249055560 has 192 divisors, whose sum is σ = 2844999780480. Its totient is φ = 222699939840.

The previous prime is 855249055513. The next prime is 855249055561. The reversal of 855249055560 is 65550942558.

It is a happy number.

855249055560 is a `hidden beast` number, since 8 + 5 + 5 + 24 + 9 + 0 + 55 + 560 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 855249055497 and 855249055506.

It is not an unprimeable number, because it can be changed into a prime (855249055561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85460077 + ... + 85470083.

It is an arithmetic number, because the mean of its divisors is an integer number (14817707190).

Almost surely, 2^855249055560 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 855249055560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422499890240).

855249055560 is an abundant number, since it is smaller than the sum of its proper divisors (1989750724920).

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

855249055560 is a wasteful number, since it uses less digits than its factorization.

855249055560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15588 (or 15581 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 54.

The spelling of 855249055560 in words is "eight hundred fifty-five billion, two hundred forty-nine million, fifty-five thousand, five hundred sixty".