1643362252211 has 2 divisors, whose sum is σ = 1643362252212. Its totient is φ = 1643362252210.

The previous prime is 1643362252177. The next prime is 1643362252229. The reversal of 1643362252211 is 1122522633461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1643362252211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1643362252811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821681126105 + 821681126106.

It is an arithmetic number, because the mean of its divisors is an integer number (821681126106).

Almost surely, 2^{1643362252211} is an apocalyptic number.

1643362252211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643362252211 is an equidigital number, since it uses as much as digits as its factorization.

1643362252211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

Adding to 1643362252211 its reverse (1122522633461), we get a palindrome (2765884885672).

The spelling of 1643362252211 in words is "one trillion, six hundred forty-three billion, three hundred sixty-two million, two hundred fifty-two thousand, two hundred eleven".