855445500 has 288 divisors, whose sum is σ = 3322999680. Its totient is φ = 180403200.

The previous prime is 855445471. The next prime is 855445501. The reversal of 855445500 is 5544558.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855445501) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 408456 + ... + 410544.

Almost surely, 2^855445500 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 855445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661499840).

855445500 is an abundant number, since it is smaller than the sum of its proper divisors (2467554180).

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

855445500 is a wasteful number, since it uses less digits than its factorization.

855445500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 855445500 is about 29247.9999316193. Note that the first 4 decimals coincide. The cubic root of 855445500 is about 949.2868146843.

The spelling of 855445500 in words is "eight hundred fifty-five million, four hundred forty-five thousand, five hundred".