6709742406728 has 8 divisors (see below), whose sum is σ = 12580767012630. Its totient is φ = 3354871203360.

The previous prime is 6709742406691. The next prime is 6709742406749. The reversal of 6709742406728 is 8276042479076.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5389352964004 + 1320389442724 = 2321498^2 + 1149082^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419358900413 + ... + 419358900428.

Almost surely, 2^{6709742406728} is an apocalyptic number.

It is an amenable number.

6709742406728 is a deficient number, since it is larger than the sum of its proper divisors (5871024605902).

6709742406728 is a wasteful number, since it uses less digits than its factorization.

6709742406728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838717800847 (or 838717800843 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 62.

The spelling of 6709742406728 in words is "six trillion, seven hundred nine billion, seven hundred forty-two million, four hundred six thousand, seven hundred twenty-eight".