6840128888863 has 2 divisors, whose sum is σ = 6840128888864. Its totient is φ = 6840128888862.

The previous prime is 6840128888809. The next prime is 6840128888881. The reversal of 6840128888863 is 3688888210486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6840128888863 - 2²¹ = 6840126791711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6840128888792 and 6840128888801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840128888963) 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, 3420064444431 + 3420064444432.

It is an arithmetic number, because the mean of its divisors is an integer number (3420064444432).

Almost surely, 2^{6840128888863} is an apocalyptic number.

6840128888863 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840128888863 is an equidigital number, since it uses as much as digits as its factorization.

6840128888863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226492416, while the sum is 70.

The spelling of 6840128888863 in words is "six trillion, eight hundred forty billion, one hundred twenty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-three".