855043575120 has 630 divisors, whose sum is σ = 3473579919402. Its totient is φ = 195081239808.

The previous prime is 855043575083. The next prime is 855043575131. The reversal of 855043575120 is 21575340558.

855043575120 is a `hidden beast` number, since 8 + 5 + 50 + 4 + 3 + 575 + 1 + 20 = 666.

It can be written as a sum of positive squares in only one way, i.e., 684034860096 + 171008715024 = 827064^2 + 413532^2 .

It is a tau number, because it is divible by the number of its divisors (630).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 1563150687 + ... + 1563151233.

Almost surely, 2^855043575120 is an apocalyptic number.

855043575120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855043575120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736789959701).

855043575120 is an abundant number, since it is smaller than the sum of its proper divisors (2618536344282).

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

855043575120 is an frugal number, since it uses more digits than its factorization.

855043575120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

Multiplying 855043575120 by its sum of digits (45), we get a square (38476960880400 = 6202980²).

855043575120 divided by its sum of digits (45) gives a square (19000968336 = 137844²).

The spelling of 855043575120 in words is "eight hundred fifty-five billion, forty-three million, five hundred seventy-five thousand, one hundred twenty".