1223651599669 has 2 divisors, whose sum is σ = 1223651599670. Its totient is φ = 1223651599668.

The previous prime is 1223651599661. The next prime is 1223651599711. The reversal of 1223651599669 is 9669951563221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686528244900 + 537123354769 = 828570^2 + 732887^2 .

It is an emirp because it is prime and its reverse (9669951563221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223651599669 - 2³ = 1223651599661 is a prime.

It is a super-2 number, since 2×1223651599669² (a number of 25 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 1223651599669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223651599661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611825799834 + 611825799835.

It is an arithmetic number, because the mean of its divisors is an integer number (611825799835).

Almost surely, 2^{1223651599669} is an apocalyptic number.

It is an amenable number.

1223651599669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223651599669 is an equidigital number, since it uses as much as digits as its factorization.

1223651599669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47239200, while the sum is 64.

The spelling of 1223651599669 in words is "one trillion, two hundred twenty-three billion, six hundred fifty-one million, five hundred ninety-nine thousand, six hundred sixty-nine".