1100001000643 has 2 divisors, whose sum is σ = 1100001000644. Its totient is φ = 1100001000642.

The previous prime is 1100001000641. The next prime is 1100001000731. The reversal of 1100001000643 is 3460001000011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1100001000643 - 2¹ = 1100001000641 is a prime.

Together with 1100001000641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1100001000641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550000500321 + 550000500322.

It is an arithmetic number, because the mean of its divisors is an integer number (550000500322).

Almost surely, 2^{1100001000643} is an apocalyptic number.

1100001000643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100001000643 is an equidigital number, since it uses as much as digits as its factorization.

1100001000643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1100001000643 its reverse (3460001000011), we get a palindrome (4560002000654).

The spelling of 1100001000643 in words is "one trillion, one hundred billion, one million, six hundred forty-three", and thus it is an aban number.