6813478772 has 12 divisors (see below), whose sum is σ = 11937097536. Its totient is φ = 3402879480.

The previous prime is 6813478741. The next prime is 6813478781. The reversal of 6813478772 is 2778743186.

It is a congruent number.

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, 961004 + ... + 968067.

It is an arithmetic number, because the mean of its divisors is an integer number (994758128).

Almost surely, 2^6813478772 is an apocalyptic number.

It is an amenable number.

6813478772 is a deficient number, since it is larger than the sum of its proper divisors (5123618764).

6813478772 is a wasteful number, since it uses less digits than its factorization.

6813478772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929958 (or 1929956 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 53.

The square root of 6813478772 is about 82543.7991129558. The cubic root of 6813478772 is about 1895.7874141498.

The spelling of 6813478772 in words is "six billion, eight hundred thirteen million, four hundred seventy-eight thousand, seven hundred seventy-two".