1643300016473 has 2 divisors, whose sum is σ = 1643300016474. Its totient is φ = 1643300016472.

The previous prime is 1643300016389. The next prime is 1643300016511. The reversal of 1643300016473 is 3746100033461.

It is an a-pointer prime, because the next prime (1643300016511) can be obtained adding 1643300016473 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1352178260224 + 291121756249 = 1162832^2 + 539557^2 .

It is a cyclic number.

It is not a de Polignac number, because 1643300016473 - 2¹⁰ = 1643300015449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1643300016073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821650008236 + 821650008237.

It is an arithmetic number, because the mean of its divisors is an integer number (821650008237).

Almost surely, 2^{1643300016473} is an apocalyptic number.

It is an amenable number.

1643300016473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1643300016473 is an equidigital number, since it uses as much as digits as its factorization.

1643300016473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 1643300016473 in words is "one trillion, six hundred forty-three billion, three hundred million, sixteen thousand, four hundred seventy-three".