3668195879609 has 2 divisors, whose sum is σ = 3668195879610. Its totient is φ = 3668195879608.

The previous prime is 3668195879507. The next prime is 3668195879617. The reversal of 3668195879609 is 9069785918663.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2212968636025 + 1455227243584 = 1487605^2 + 1206328^2 .

It is an emirp because it is prime and its reverse (9069785918663) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3668195879609 is a prime.

It is a super-2 number, since 2×3668195879609² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3668195879609.

It is not a weakly prime, because it can be changed into another prime (3668195849609) 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 as a sum of consecutive naturals, namely, 1834097939804 + 1834097939805.

It is an arithmetic number, because the mean of its divisors is an integer number (1834097939805).

Almost surely, 2^{3668195879609} is an apocalyptic number.

It is an amenable number.

3668195879609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3668195879609 is an equidigital number, since it uses as much as digits as its factorization.

3668195879609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058158080, while the sum is 77.

The spelling of 3668195879609 in words is "three trillion, six hundred sixty-eight billion, one hundred ninety-five million, eight hundred seventy-nine thousand, six hundred nine".