1011643420663 has 2 divisors, whose sum is σ = 1011643420664. Its totient is φ = 1011643420662.

The previous prime is 1011643420657. The next prime is 1011643420679. The reversal of 1011643420663 is 3660243461101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011643420663 - 2²⁵ = 1011609866231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011643424663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505821710331 + 505821710332.

It is an arithmetic number, because the mean of its divisors is an integer number (505821710332).

Almost surely, 2^{1011643420663} is an apocalyptic number.

1011643420663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011643420663 is an equidigital number, since it uses as much as digits as its factorization.

1011643420663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

Adding to 1011643420663 its reverse (3660243461101), we get a palindrome (4671886881764).

The spelling of 1011643420663 in words is "one trillion, eleven billion, six hundred forty-three million, four hundred twenty thousand, six hundred sixty-three".