6844998978 has 24 divisors (see below), whose sum is σ = 15073961916. Its totient is φ = 2244261600.

The previous prime is 6844998977. The next prime is 6844998991. The reversal of 6844998978 is 8798994486.

6844998978 is a `hidden beast` number, since 6 + 8 + 449 + 98 + 97 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6757333209 + 87665769 = 82203^2 + 9363^2 .

It is a super-2 number, since 2×6844998978² = 93708022017642088968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6844998977) 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 11 ways as a sum of consecutive naturals, for example, 3115933 + ... + 3118128.

Almost surely, 2^6844998978 is an apocalyptic number.

6844998978 is an abundant number, since it is smaller than the sum of its proper divisors (8228962938).

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

6844998978 is a wasteful number, since it uses less digits than its factorization.

6844998978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234130 (or 6234127 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The square root of 6844998978 is about 82734.5089911096. The cubic root of 6844998978 is about 1898.7063195377.

The spelling of 6844998978 in words is "six billion, eight hundred forty-four million, nine hundred ninety-eight thousand, nine hundred seventy-eight".