63491837648023 has 2 divisors, whose sum is σ = 63491837648024. Its totient is φ = 63491837648022.

The previous prime is 63491837648017. The next prime is 63491837648047. The reversal of 63491837648023 is 32084673819436.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63491837648023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63491837748023) 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, 31745918824011 + 31745918824012.

It is an arithmetic number, because the mean of its divisors is an integer number (31745918824012).

Almost surely, 2^{63491837648023} is an apocalyptic number.

63491837648023 is a deficient number, since it is larger than the sum of its proper divisors (1).

63491837648023 is an equidigital number, since it uses as much as digits as its factorization.

63491837648023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125411328, while the sum is 64.

The spelling of 63491837648023 in words is "sixty-three trillion, four hundred ninety-one billion, eight hundred thirty-seven million, six hundred forty-eight thousand, twenty-three".