1643252347111 has 2 divisors, whose sum is σ = 1643252347112. Its totient is φ = 1643252347110.

The previous prime is 1643252347091. The next prime is 1643252347153. The reversal of 1643252347111 is 1117432523461.

It is a weak prime.

It is an emirp because it is prime and its reverse (1117432523461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1643252347111 - 2¹³ = 1643252338919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1643252347171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821626173555 + 821626173556.

It is an arithmetic number, because the mean of its divisors is an integer number (821626173556).

Almost surely, 2^{1643252347111} is an apocalyptic number.

1643252347111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643252347111 is an equidigital number, since it uses as much as digits as its factorization.

1643252347111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The spelling of 1643252347111 in words is "one trillion, six hundred forty-three billion, two hundred fifty-two million, three hundred forty-seven thousand, one hundred eleven".