6781573873 has 2 divisors, whose sum is σ = 6781573874. Its totient is φ = 6781573872.

The previous prime is 6781573871. The next prime is 6781573937. The reversal of 6781573873 is 3783751876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6467858929 + 313714944 = 80423^2 + 17712^2 .

It is a cyclic number.

It is not a de Polignac number, because 6781573873 - 2¹ = 6781573871 is a prime.

Together with 6781573871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6781573871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390786936 + 3390786937.

It is an arithmetic number, because the mean of its divisors is an integer number (3390786937).

Almost surely, 2^6781573873 is an apocalyptic number.

It is an amenable number.

6781573873 is a deficient number, since it is larger than the sum of its proper divisors (1).

6781573873 is an equidigital number, since it uses as much as digits as its factorization.

6781573873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5927040, while the sum is 55.

The square root of 6781573873 is about 82350.3119180492. The cubic root of 6781573873 is about 1892.8237023882.

The spelling of 6781573873 in words is "six billion, seven hundred eighty-one million, five hundred seventy-three thousand, eight hundred seventy-three".