847494817920 has 128 divisors (see below), whose sum is σ = 3001544208000. Its totient is φ = 225998613504.

The previous prime is 847494817907. The next prime is 847494817943. The reversal of 847494817920 is 29718494748.

847494817920 is a `hidden beast` number, since 8 + 47 + 49 + 481 + 79 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24505140 + ... + 24539699.

It is an arithmetic number, because the mean of its divisors is an integer number (23449564125).

Almost surely, 2^847494817920 is an apocalyptic number.

847494817920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

847494817920 is an abundant number, since it is smaller than the sum of its proper divisors (2154049390080).

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

847494817920 is a wasteful number, since it uses less digits than its factorization.

847494817920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49044867 (or 49044849 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 847494817920 in words is "eight hundred forty-seven billion, four hundred ninety-four million, eight hundred seventeen thousand, nine hundred twenty".