6471780009 has 16 divisors (see below), whose sum is σ = 8863610112. Its totient is φ = 4198297088.

The previous prime is 6471779971. The next prime is 6471780047. The reversal of 6471780009 is 9000871746.

It is an interprime number because it is at equal distance from previous prime (6471779971) and next prime (6471780047).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6471780009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6471780109) 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 in 15 ways as a sum of consecutive naturals, for example, 108264 + ... + 157049.

It is an arithmetic number, because the mean of its divisors is an integer number (553975632).

Almost surely, 2^6471780009 is an apocalyptic number.

It is an amenable number.

6471780009 is a deficient number, since it is larger than the sum of its proper divisors (2391830103).

6471780009 is a wasteful number, since it uses less digits than its factorization.

6471780009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265536.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 6471780009 is about 80447.3741585143. The cubic root of 6471780009 is about 1863.5508544747.

The spelling of 6471780009 in words is "six billion, four hundred seventy-one million, seven hundred eighty thousand, nine".