7078681778 has 16 divisors (see below), whose sum is σ = 12159020160. Its totient is φ = 3027686496.

The previous prime is 7078681777. The next prime is 7078681807. The reversal of 7078681778 is 8771868707.

It is not an unprimeable number, because it can be changed into a prime (7078681777) by changing a digit.

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, 495563 + ... + 509646.

It is an arithmetic number, because the mean of its divisors is an integer number (759938760).

Almost surely, 2^7078681778 is an apocalyptic number.

7078681778 is a deficient number, since it is larger than the sum of its proper divisors (5080338382).

7078681778 is a wasteful number, since it uses less digits than its factorization.

7078681778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005721.

The product of its (nonzero) digits is 7375872, while the sum is 59.

The square root of 7078681778 is about 84134.9022582186. The cubic root of 7078681778 is about 1920.0717726714.

The spelling of 7078681778 in words is "seven billion, seventy-eight million, six hundred eighty-one thousand, seven hundred seventy-eight".