855294439020 has 192 divisors, whose sum is σ = 2861917470720. Its totient is φ = 186604653312.

The previous prime is 855294439019. The next prime is 855294439049. The reversal of 855294439020 is 20934492558.

855294439020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4534719 + ... + 4719561.

It is an arithmetic number, because the mean of its divisors is an integer number (14905820160).

Almost surely, 2^855294439020 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 855294439020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430958735360).

855294439020 is an abundant number, since it is smaller than the sum of its proper divisors (2006623031700).

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

855294439020 is a wasteful number, since it uses less digits than its factorization.

855294439020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185364 (or 185362 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 855294439020 in words is "eight hundred fifty-five billion, two hundred ninety-four million, four hundred thirty-nine thousand, twenty".