6781568 has 16 divisors (see below), whose sum is σ = 13510410. Its totient is φ = 3390720.

The previous prime is 6781559. The next prime is 6781603. The reversal of 6781568 is 8651876.

It can be written as a sum of positive squares in only one way, i.e., 3655744 + 3125824 = 1912^2 + 1768^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26363 + ... + 26618.

Almost surely, 2^6781568 is an apocalyptic number.

It is an amenable number.

6781568 is a deficient number, since it is larger than the sum of its proper divisors (6728842).

6781568 is an equidigital number, since it uses as much as digits as its factorization.

6781568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52995 (or 52983 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 6781568 is about 2604.1443892380. The cubic root of 6781568 is about 189.2823155978.

The spelling of 6781568 in words is "six million, seven hundred eighty-one thousand, five hundred sixty-eight".