9471894999840 has 768 divisors, whose sum is σ = 42209025868800. Its totient is φ = 1929550823424.

The previous prime is 9471894999817. The next prime is 9471894999923. The reversal of 9471894999840 is 489994981749.

9471894999840 is a `hidden beast` number, since 9 + 4 + 7 + 1 + 89 + 499 + 9 + 8 + 40 = 666.

9471894999840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9471894999840.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10985064 + ... + 11815896.

It is an arithmetic number, because the mean of its divisors is an integer number (54959669100).

Almost surely, 2^{9471894999840} is an apocalyptic number.

9471894999840 is a gapful number since it is divisible by the number (90) 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 9471894999840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21104512934400).

9471894999840 is an abundant number, since it is smaller than the sum of its proper divisors (32737130868960).

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

9471894999840 is a wasteful number, since it uses less digits than its factorization.

9471894999840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830906 (or 830892 counting only the distinct ones).

The product of its (nonzero) digits is 1693052928, while the sum is 81.

The spelling of 9471894999840 in words is "nine trillion, four hundred seventy-one billion, eight hundred ninety-four million, nine hundred ninety-nine thousand, eight hundred forty".