1639888929017 has 2 divisors, whose sum is σ = 1639888929018. Its totient is φ = 1639888929016.

The previous prime is 1639888929013. The next prime is 1639888929031. The reversal of 1639888929017 is 7109298889361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 872484896761 + 767404032256 = 934069^2 + 876016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1639888929017 - 2² = 1639888929013 is a prime.

It is not a weakly prime, because it can be changed into another prime (1639888929013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819944464508 + 819944464509.

It is an arithmetic number, because the mean of its divisors is an integer number (819944464509).

Almost surely, 2^{1639888929017} is an apocalyptic number.

It is an amenable number.

1639888929017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639888929017 is an equidigital number, since it uses as much as digits as its factorization.

1639888929017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 71.

The spelling of 1639888929017 in words is "one trillion, six hundred thirty-nine billion, eight hundred eighty-eight million, nine hundred twenty-nine thousand, seventeen".