6909430405816 has 8 divisors (see below), whose sum is σ = 12955182010920. Its totient is φ = 3454715202904.

The previous prime is 6909430405751. The next prime is 6909430405841. The reversal of 6909430405816 is 6185040349096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 431839400356 + ... + 431839400371.

It is an arithmetic number, because the mean of its divisors is an integer number (1619397751365).

Almost surely, 2^{6909430405816} is an apocalyptic number.

It is an amenable number.

6909430405816 is a deficient number, since it is larger than the sum of its proper divisors (6045751605104).

6909430405816 is a wasteful number, since it uses less digits than its factorization.

6909430405816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863678800733 (or 863678800729 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 6909430405816 in words is "six trillion, nine hundred nine billion, four hundred thirty million, four hundred five thousand, eight hundred sixteen".