855806489280 has 448 divisors, whose sum is σ = 3052138452480. Its totient is φ = 225731432448.

The previous prime is 855806489273. The next prime is 855806489299. The reversal of 855806489280 is 82984608558.

855806489280 is a `hidden beast` number, since 8 + 5 + 580 + 6 + 48 + 9 + 2 + 8 + 0 = 666.

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, 319687302 + ... + 319689978.

Almost surely, 2^855806489280 is an apocalyptic number.

855806489280 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 855806489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526069226240).

855806489280 is an abundant number, since it is smaller than the sum of its proper divisors (2196331963200).

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

855806489280 is a wasteful number, since it uses less digits than its factorization.

855806489280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093 (or 3077 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 855806489280 in words is "eight hundred fifty-five billion, eight hundred six million, four hundred eighty-nine thousand, two hundred eighty".