6978434371705 has 16 divisors (see below), whose sum is σ = 8572106150784. Its totient is φ = 5450855679360.

The previous prime is 6978434371663. The next prime is 6978434371709. The reversal of 6978434371705 is 5071734348796.

It is a happy number.

6978434371705 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6978434371705 - 2⁷ = 6978434371577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6978434371709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5561956 + ... + 6700165.

It is an arithmetic number, because the mean of its divisors is an integer number (535756634424).

Almost surely, 2^{6978434371705} is an apocalyptic number.

It is an amenable number.

6978434371705 is a deficient number, since it is larger than the sum of its proper divisors (1593671779079).

6978434371705 is a wasteful number, since it uses less digits than its factorization.

6978434371705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12264816.

The product of its (nonzero) digits is 106686720, while the sum is 64.

The spelling of 6978434371705 in words is "six trillion, nine hundred seventy-eight billion, four hundred thirty-four million, three hundred seventy-one thousand, seven hundred five".