423631342663663 has 2 divisors, whose sum is σ = 423631342663664. Its totient is φ = 423631342663662.

The previous prime is 423631342663609. The next prime is 423631342663667. The reversal of 423631342663663 is 366366243136324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423631342663663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423631342663598 and 423631342663607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423631342663667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211815671331831 + 211815671331832.

It is an arithmetic number, because the mean of its divisors is an integer number (211815671331832).

Almost surely, 2^{423631342663663} is an apocalyptic number.

423631342663663 is a deficient number, since it is larger than the sum of its proper divisors (1).

423631342663663 is an equidigital number, since it uses as much as digits as its factorization.

423631342663663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120932352, while the sum is 58.

Adding to 423631342663663 its reverse (366366243136324), we get a palindrome (789997585799987).

The spelling of 423631342663663 in words is "four hundred twenty-three trillion, six hundred thirty-one billion, three hundred forty-two million, six hundred sixty-three thousand, six hundred sixty-three".