423631340566849 has 2 divisors, whose sum is σ = 423631340566850. Its totient is φ = 423631340566848.

The previous prime is 423631340566831. The next prime is 423631340566859. The reversal of 423631340566849 is 948665043136324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386568290595600 + 37063049971249 = 19661340^2 + 6087943^2 .

It is a cyclic number.

It is not a de Polignac number, because 423631340566849 - 2⁴⁷ = 282893852211521 is a prime.

It is not a weakly prime, because it can be changed into another prime (423631340566859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211815670283424 + 211815670283425.

It is an arithmetic number, because the mean of its divisors is an integer number (211815670283425).

Almost surely, 2^{423631340566849} is an apocalyptic number.

It is an amenable number.

423631340566849 is a deficient number, since it is larger than the sum of its proper divisors (1).

423631340566849 is an equidigital number, since it uses as much as digits as its factorization.

423631340566849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268738560, while the sum is 64.

The spelling of 423631340566849 in words is "four hundred twenty-three trillion, six hundred thirty-one billion, three hundred forty million, five hundred sixty-six thousand, eight hundred forty-nine".