1491326423963 has 2 divisors, whose sum is σ = 1491326423964. Its totient is φ = 1491326423962.

The previous prime is 1491326423959. The next prime is 1491326424011. The reversal of 1491326423963 is 3693246231941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491326423963 - 2² = 1491326423959 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491326423933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745663211981 + 745663211982.

It is an arithmetic number, because the mean of its divisors is an integer number (745663211982).

Almost surely, 2^{1491326423963} is an apocalyptic number.

1491326423963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491326423963 is an equidigital number, since it uses as much as digits as its factorization.

1491326423963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 53.

The spelling of 1491326423963 in words is "one trillion, four hundred ninety-one billion, three hundred twenty-six million, four hundred twenty-three thousand, nine hundred sixty-three".