67328641909 has 4 divisors (see below), whose sum is σ = 67340135340. Its totient is φ = 67317148480.

The previous prime is 67328641843. The next prime is 67328641943. The reversal of 67328641909 is 90914682376.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54856666225 + 12471975684 = 234215^2 + 111678^2 .

It is a cyclic number.

It is not a de Polignac number, because 67328641909 - 2³¹ = 65181158261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67328641909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67328641309) 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, 5737924 + ... + 5749645.

It is an arithmetic number, because the mean of its divisors is an integer number (16835033835).

Almost surely, 2^67328641909 is an apocalyptic number.

It is an amenable number.

67328641909 is a deficient number, since it is larger than the sum of its proper divisors (11493431).

67328641909 is a wasteful number, since it uses less digits than its factorization.

67328641909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493430.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 67328641909 in words is "sixty-seven billion, three hundred twenty-eight million, six hundred forty-one thousand, nine hundred nine".