3218085637409 has 2 divisors, whose sum is σ = 3218085637410. Its totient is φ = 3218085637408.

The previous prime is 3218085637381. The next prime is 3218085637457. The reversal of 3218085637409 is 9047365808123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3218077210000 + 8427409 = 1793900^2 + 2903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3218085637409 is a prime.

It is not a weakly prime, because it can be changed into another prime (3218085637009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609042818704 + 1609042818705.

It is an arithmetic number, because the mean of its divisors is an integer number (1609042818705).

It is a 1-persistent number, because it is pandigital, but 2⋅3218085637409 = 6436171274818 is not.

Almost surely, 2^{3218085637409} is an apocalyptic number.

It is an amenable number.

3218085637409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218085637409 is an equidigital number, since it uses as much as digits as its factorization.

3218085637409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 3218085637409 in words is "three trillion, two hundred eighteen billion, eighty-five million, six hundred thirty-seven thousand, four hundred nine".