23663977217 has 2 divisors, whose sum is σ = 23663977218. Its totient is φ = 23663977216.

The previous prime is 23663977199. The next prime is 23663977247. The reversal of 23663977217 is 71277936632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20276620816 + 3387356401 = 142396^2 + 58201^2 .

It is a cyclic number.

It is not a de Polignac number, because 23663977217 - 2¹² = 23663973121 is a prime.

It is not a weakly prime, because it can be changed into another prime (23663977247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11831988608 + 11831988609.

It is an arithmetic number, because the mean of its divisors is an integer number (11831988609).

Almost surely, 2^23663977217 is an apocalyptic number.

It is an amenable number.

23663977217 is a deficient number, since it is larger than the sum of its proper divisors (1).

23663977217 is an equidigital number, since it uses as much as digits as its factorization.

23663977217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 53.

The spelling of 23663977217 in words is "twenty-three billion, six hundred sixty-three million, nine hundred seventy-seven thousand, two hundred seventeen".