6805378986 has 16 divisors (see below), whose sum is σ = 15555152064. Its totient is φ = 1944393984.

The previous prime is 6805378969. The next prime is 6805379027. The reversal of 6805378986 is 6898735086.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81016375 + ... + 81016458.

It is an arithmetic number, because the mean of its divisors is an integer number (972197004).

Almost surely, 2^6805378986 is an apocalyptic number.

6805378986 is an abundant number, since it is smaller than the sum of its proper divisors (8749773078).

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

6805378986 is a wasteful number, since it uses less digits than its factorization.

6805378986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162032845.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The square root of 6805378986 is about 82494.7209583741. The cubic root of 6805378986 is about 1895.0358861030.

The spelling of 6805378986 in words is "six billion, eight hundred five million, three hundred seventy-eight thousand, nine hundred eighty-six".