11643281423 has 2 divisors, whose sum is σ = 11643281424. Its totient is φ = 11643281422.

The previous prime is 11643281399. The next prime is 11643281509. The reversal of 11643281423 is 32418234611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11643281423 - 2²⁴ = 11626504207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11643280423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821640711 + 5821640712.

It is an arithmetic number, because the mean of its divisors is an integer number (5821640712).

Almost surely, 2^11643281423 is an apocalyptic number.

11643281423 is a deficient number, since it is larger than the sum of its proper divisors (1).

11643281423 is an equidigital number, since it uses as much as digits as its factorization.

11643281423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The spelling of 11643281423 in words is "eleven billion, six hundred forty-three million, two hundred eighty-one thousand, four hundred twenty-three".