1688884642073 has 2 divisors, whose sum is σ = 1688884642074. Its totient is φ = 1688884642072.

The previous prime is 1688884642057. The next prime is 1688884642117. The reversal of 1688884642073 is 3702464888861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1195530120409 + 493354521664 = 1093403^2 + 702392^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688884642073 - 2⁴ = 1688884642057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1688884645073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844442321036 + 844442321037.

It is an arithmetic number, because the mean of its divisors is an integer number (844442321037).

Almost surely, 2^{1688884642073} is an apocalyptic number.

It is an amenable number.

1688884642073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688884642073 is an equidigital number, since it uses as much as digits as its factorization.

1688884642073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 99090432, while the sum is 65.

The spelling of 1688884642073 in words is "one trillion, six hundred eighty-eight billion, eight hundred eighty-four million, six hundred forty-two thousand, seventy-three".