6840128888843 has 4 divisors (see below), whose sum is σ = 7006961300808. Its totient is φ = 6673296476880.

The previous prime is 6840128888809. The next prime is 6840128888863. The reversal of 6840128888843 is 3488888210486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6840128888843 - 2⁶ = 6840128888779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6840128888863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83416205921 + ... + 83416206002.

It is an arithmetic number, because the mean of its divisors is an integer number (1751740325202).

Almost surely, 2^{6840128888843} is an apocalyptic number.

6840128888843 is a deficient number, since it is larger than the sum of its proper divisors (166832411965).

6840128888843 is a wasteful number, since it uses less digits than its factorization.

6840128888843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166832411964.

The product of its (nonzero) digits is 150994944, while the sum is 68.

The spelling of 6840128888843 in words is "six trillion, eight hundred forty billion, one hundred twenty-eight million, eight hundred eighty-eight thousand, eight hundred forty-three".