23623266782009 has 2 divisors, whose sum is σ = 23623266782010. Its totient is φ = 23623266782008.

The previous prime is 23623266781949. The next prime is 23623266782029. The reversal of 23623266782009 is 90028766232632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21994899376384 + 1628367405625 = 4689872^2 + 1276075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23623266782009 is a prime.

It is not a weakly prime, because it can be changed into another prime (23623266782029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11811633391004 + 11811633391005.

It is an arithmetic number, because the mean of its divisors is an integer number (11811633391005).

Almost surely, 2^{23623266782009} is an apocalyptic number.

It is an amenable number.

23623266782009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23623266782009 is an equidigital number, since it uses as much as digits as its factorization.

23623266782009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 23623266782009 in words is "twenty-three trillion, six hundred twenty-three billion, two hundred sixty-six million, seven hundred eighty-two thousand, nine".