6781420911 has 4 divisors (see below), whose sum is σ = 9041894552. Its totient is φ = 4520947272.

The previous prime is 6781420889. The next prime is 6781420931. The reversal of 6781420911 is 1190241876.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6781420911 - 2²⁷ = 6647203183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6781420911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781420931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130236816 + ... + 1130236821.

It is an arithmetic number, because the mean of its divisors is an integer number (2260473638).

Almost surely, 2^6781420911 is an apocalyptic number.

6781420911 is a deficient number, since it is larger than the sum of its proper divisors (2260473641).

6781420911 is a wasteful number, since it uses less digits than its factorization.

6781420911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260473640.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 6781420911 is about 82349.3831853038. The cubic root of 6781420911 is about 1892.8094710666.

The spelling of 6781420911 in words is "six billion, seven hundred eighty-one million, four hundred twenty thousand, nine hundred eleven".