9994856678 has 8 divisors (see below), whose sum is σ = 15644123568. Its totient is φ = 4780148824.

The previous prime is 9994856671. The next prime is 9994856681. The reversal of 9994856678 is 8766584999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9994856678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9994856671) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 108639701 + ... + 108639792.

It is an arithmetic number, because the mean of its divisors is an integer number (1955515446).

Almost surely, 2^9994856678 is an apocalyptic number.

9994856678 is a deficient number, since it is larger than the sum of its proper divisors (5649266890).

9994856678 is a wasteful number, since it uses less digits than its factorization.

9994856678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217279518.

The product of its digits is 235146240, while the sum is 71.

The square root of 9994856678 is about 99974.2800824292. The cubic root of 9994856678 is about 2154.0652616437.

The spelling of 9994856678 in words is "nine billion, nine hundred ninety-four million, eight hundred fifty-six thousand, six hundred seventy-eight".