6815407871 has 2 divisors, whose sum is σ = 6815407872. Its totient is φ = 6815407870.

The previous prime is 6815407867. The next prime is 6815407897. The reversal of 6815407871 is 1787045186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6815407871 - 2² = 6815407867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6815487871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407703935 + 3407703936.

It is an arithmetic number, because the mean of its divisors is an integer number (3407703936).

Almost surely, 2^6815407871 is an apocalyptic number.

6815407871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6815407871 is an equidigital number, since it uses as much as digits as its factorization.

6815407871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 47.

The square root of 6815407871 is about 82555.4835913400. The cubic root of 6815407871 is about 1895.9663152482.

The spelling of 6815407871 in words is "six billion, eight hundred fifteen million, four hundred seven thousand, eight hundred seventy-one".