1663632404429 has 2 divisors, whose sum is σ = 1663632404430. Its totient is φ = 1663632404428.

The previous prime is 1663632404383. The next prime is 1663632404459. The reversal of 1663632404429 is 9244042363661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1663073318404 + 559086025 = 1289602^2 + 23645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663632404429 - 2⁸ = 1663632404173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663632404459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831816202214 + 831816202215.

It is an arithmetic number, because the mean of its divisors is an integer number (831816202215).

Almost surely, 2^{1663632404429} is an apocalyptic number.

It is an amenable number.

1663632404429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663632404429 is an equidigital number, since it uses as much as digits as its factorization.

1663632404429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 50.

The spelling of 1663632404429 in words is "one trillion, six hundred sixty-three billion, six hundred thirty-two million, four hundred four thousand, four hundred twenty-nine".