9818478684 has 216 divisors, whose sum is σ = 30814514640. Its totient is φ = 2620574208.

The previous prime is 9818478667. The next prime is 9818478697. The reversal of 9818478684 is 4868748189.

9818478684 is a `hidden beast` number, since 9 + 81 + 8 + 478 + 6 + 84 = 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 polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2444662 + ... + 2448674.

It is an arithmetic number, because the mean of its divisors is an integer number (142659790).

Almost surely, 2^9818478684 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 9818478684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15407257320).

9818478684 is an abundant number, since it is smaller than the sum of its proper divisors (20996035956).

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

9818478684 is a wasteful number, since it uses less digits than its factorization.

9818478684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129 (or 4117 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 63.

The square root of 9818478684 is about 99088.2368598816. The cubic root of 9818478684 is about 2141.3191479556.

The spelling of 9818478684 in words is "nine billion, eight hundred eighteen million, four hundred seventy-eight thousand, six hundred eighty-four".