423423224144549 has 2 divisors, whose sum is σ = 423423224144550. Its totient is φ = 423423224144548.

The previous prime is 423423224144537. The next prime is 423423224144653. The reversal of 423423224144549 is 945441422324324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297217255200100 + 126205968944449 = 17239990^2 + 11234143^2 .

It is a cyclic number.

It is not a de Polignac number, because 423423224144549 - 2⁴⁴ = 405831038100133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 423423224144549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423423224044549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211711612072274 + 211711612072275.

It is an arithmetic number, because the mean of its divisors is an integer number (211711612072275).

Almost surely, 2^{423423224144549} is an apocalyptic number.

It is an amenable number.

423423224144549 is a deficient number, since it is larger than the sum of its proper divisors (1).

423423224144549 is an equidigital number, since it uses as much as digits as its factorization.

423423224144549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26542080, while the sum is 53.

The spelling of 423423224144549 in words is "four hundred twenty-three trillion, four hundred twenty-three billion, two hundred twenty-four million, one hundred forty-four thousand, five hundred forty-nine".