9840673427978 has 16 divisors (see below), whose sum is σ = 15421198723560. Its totient is φ = 4703633592000.

The previous prime is 9840673427971. The next prime is 9840673428029. The reversal of 9840673427978 is 8797243760489.

It can be written as a sum of positive squares in 4 ways, for example, as 9185766824809 + 654906603169 = 3030803^2 + 809263^2 .

It is a super-2 number, since 2×9840673427978² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9840673427971) 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 7 ways as a sum of consecutive naturals, for example, 839928713 + ... + 839940428.

Almost surely, 2^{9840673427978} is an apocalyptic number.

9840673427978 is a deficient number, since it is larger than the sum of its proper divisors (5580525295582).

9840673427978 is a wasteful number, since it uses less digits than its factorization.

9840673427978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679869273.

The product of its (nonzero) digits is 1024192512, while the sum is 74.

The spelling of 9840673427978 in words is "nine trillion, eight hundred forty billion, six hundred seventy-three million, four hundred twenty-seven thousand, nine hundred seventy-eight".