1643317358141 has 2 divisors, whose sum is σ = 1643317358142. Its totient is φ = 1643317358140.

The previous prime is 1643317358069. The next prime is 1643317358173. The reversal of 1643317358141 is 1418537133461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1430631288100 + 212686070041 = 1196090^2 + 461179^2 .

It is a cyclic number.

It is not a de Polignac number, because 1643317358141 - 2¹⁰ = 1643317357117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1643317358041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821658679070 + 821658679071.

It is an arithmetic number, because the mean of its divisors is an integer number (821658679071).

Almost surely, 2^{1643317358141} is an apocalyptic number.

It is an amenable number.

1643317358141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643317358141 is an equidigital number, since it uses as much as digits as its factorization.

1643317358141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The spelling of 1643317358141 in words is "one trillion, six hundred forty-three billion, three hundred seventeen million, three hundred fifty-eight thousand, one hundred forty-one".