6478688786 has 8 divisors (see below), whose sum is σ = 9735800880. Its totient is φ = 3233421828.

The previous prime is 6478688771. The next prime is 6478688813. The reversal of 6478688786 is 6878868746.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2959916 + ... + 2962103.

It is an arithmetic number, because the mean of its divisors is an integer number (1216975110).

Almost surely, 2^6478688786 is an apocalyptic number.

6478688786 is a deficient number, since it is larger than the sum of its proper divisors (3257112094).

6478688786 is a wasteful number, since it uses less digits than its factorization.

6478688786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922568.

The product of its digits is 173408256, while the sum is 68.

The square root of 6478688786 is about 80490.3024345169. The cubic root of 6478688786 is about 1864.2137467328.

The spelling of 6478688786 in words is "six billion, four hundred seventy-eight million, six hundred eighty-eight thousand, seven hundred eighty-six".