6836491978 has 8 divisors (see below), whose sum is σ = 10272209472. Its totient is φ = 3412422156.

The previous prime is 6836491873. The next prime is 6836491997. The reversal of 6836491978 is 8791946386.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2910450 + ... + 2912797.

It is an arithmetic number, because the mean of its divisors is an integer number (1284026184).

Almost surely, 2^6836491978 is an apocalyptic number.

6836491978 is a deficient number, since it is larger than the sum of its proper divisors (3435717494).

6836491978 is a wasteful number, since it uses less digits than its factorization.

6836491978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823836.

The product of its digits is 15676416, while the sum is 61.

The square root of 6836491978 is about 82683.0815705365. The cubic root of 6836491978 is about 1897.9194194606.

The spelling of 6836491978 in words is "six billion, eight hundred thirty-six million, four hundred ninety-one thousand, nine hundred seventy-eight".