23665211256649 has 2 divisors, whose sum is σ = 23665211256650. Its totient is φ = 23665211256648.

The previous prime is 23665211256629. The next prime is 23665211256653. The reversal of 23665211256649 is 94665211256632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18705348201024 + 4959863055625 = 4324968^2 + 2227075^2 .

It is a cyclic number.

It is not a de Polignac number, because 23665211256649 - 2²⁷ = 23665077038921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23665211256593 and 23665211256602.

It is not a weakly prime, because it can be changed into another prime (23665211256629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11832605628324 + 11832605628325.

It is an arithmetic number, because the mean of its divisors is an integer number (11832605628325).

Almost surely, 2^{23665211256649} is an apocalyptic number.

It is an amenable number.

23665211256649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23665211256649 is an equidigital number, since it uses as much as digits as its factorization.

23665211256649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27993600, while the sum is 58.

The spelling of 23665211256649 in words is "twenty-three trillion, six hundred sixty-five billion, two hundred eleven million, two hundred fifty-six thousand, six hundred forty-nine".