6978394718 has 32 divisors (see below), whose sum is σ = 11052011520. Its totient is φ = 3298220640.

The previous prime is 6978394691. The next prime is 6978394721. The reversal of 6978394718 is 8174938796.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1376873 + ... + 1381931.

It is an arithmetic number, because the mean of its divisors is an integer number (345375360).

Almost surely, 2^6978394718 is an apocalyptic number.

6978394718 is a deficient number, since it is larger than the sum of its proper divisors (4073616802).

6978394718 is a wasteful number, since it uses less digits than its factorization.

6978394718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432.

The product of its digits is 18289152, while the sum is 62.

The square root of 6978394718 is about 83536.7866152392. The cubic root of 6978394718 is about 1910.9610869931.

The spelling of 6978394718 in words is "six billion, nine hundred seventy-eight million, three hundred ninety-four thousand, seven hundred eighteen".