6978031778 has 16 divisors (see below), whose sum is σ = 10924125696. Its totient is φ = 3336711840.

The previous prime is 6978031763. The next prime is 6978031783. The reversal of 6978031778 is 8771308796.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337775 + ... + 357837.

It is an arithmetic number, because the mean of its divisors is an integer number (682757856).

Almost surely, 2^6978031778 is an apocalyptic number.

6978031778 is a deficient number, since it is larger than the sum of its proper divisors (3946093918).

6978031778 is a wasteful number, since it uses less digits than its factorization.

6978031778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27649.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The square root of 6978031778 is about 83534.6142506207. The cubic root of 6978031778 is about 1910.9279572993.

The spelling of 6978031778 in words is "six billion, nine hundred seventy-eight million, thirty-one thousand, seven hundred seventy-eight".