855543575040 has 1920 divisors, whose sum is σ = 3675776163840. Its totient is φ = 167627980800.

The previous prime is 855543574939. The next prime is 855543575093. The reversal of 855543575040 is 40575345558.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a super-2 number, since 2×855543575040² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7571182024 + ... + 7571182136.

It is an arithmetic number, because the mean of its divisors is an integer number (1914466752).

Almost surely, 2^855543575040 is an apocalyptic number.

855543575040 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 855543575040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837888081920).

855543575040 is an abundant number, since it is smaller than the sum of its proper divisors (2820232588800).

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

855543575040 is a wasteful number, since it uses less digits than its factorization.

855543575040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 8400000, while the sum is 51.

The spelling of 855543575040 in words is "eight hundred fifty-five billion, five hundred forty-three million, five hundred seventy-five thousand, forty".