7231665412009 has 2 divisors, whose sum is σ = 7231665412010. Its totient is φ = 7231665412008.

The previous prime is 7231665412001. The next prime is 7231665412021. The reversal of 7231665412009 is 9002145661327.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6995347896384 + 236317515625 = 2644872^2 + 486125^2 .

It is a cyclic number.

It is not a de Polignac number, because 7231665412009 - 2³ = 7231665412001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7231665412009.

It is not a weakly prime, because it can be changed into another prime (7231665412001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3615832706004 + 3615832706005.

It is an arithmetic number, because the mean of its divisors is an integer number (3615832706005).

Almost surely, 2^{7231665412009} is an apocalyptic number.

It is an amenable number.

7231665412009 is a deficient number, since it is larger than the sum of its proper divisors (1).

7231665412009 is an equidigital number, since it uses as much as digits as its factorization.

7231665412009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 7231665412009 in words is "seven trillion, two hundred thirty-one billion, six hundred sixty-five million, four hundred twelve thousand, nine".