847808851680 has 384 divisors, whose sum is σ = 3426208450560. Its totient is φ = 191786434560.

The previous prime is 847808851679. The next prime is 847808851711. The reversal of 847808851680 is 86158808748.

847808851680 is a `hidden beast` number, since 8 + 478 + 0 + 8 + 85 + 1 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2788765 + ... + 3077795.

It is an arithmetic number, because the mean of its divisors is an integer number (8922417840).

Almost surely, 2^847808851680 is an apocalyptic number.

847808851680 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 847808851680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1713104225280).

847808851680 is an abundant number, since it is smaller than the sum of its proper divisors (2578399598880).

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

847808851680 is a wasteful number, since it uses less digits than its factorization.

847808851680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289159 (or 289145 counting only the distinct ones).

The product of its (nonzero) digits is 27525120, while the sum is 63.

The spelling of 847808851680 in words is "eight hundred forty-seven billion, eight hundred eight million, eight hundred fifty-one thousand, six hundred eighty".