16639484429 has 2 divisors, whose sum is σ = 16639484430. Its totient is φ = 16639484428.

The previous prime is 16639484347. The next prime is 16639484431. The reversal of 16639484429 is 92448493661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11795046025 + 4844438404 = 108605^2 + 69602^2 .

It is a cyclic number.

It is not a de Polignac number, because 16639484429 - 2²⁸ = 16371048973 is a prime.

Together with 16639484431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16639481429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319742214 + 8319742215.

It is an arithmetic number, because the mean of its divisors is an integer number (8319742215).

Almost surely, 2^16639484429 is an apocalyptic number.

It is an amenable number.

16639484429 is a deficient number, since it is larger than the sum of its proper divisors (1).

16639484429 is an equidigital number, since it uses as much as digits as its factorization.

16639484429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 56.

The spelling of 16639484429 in words is "sixteen billion, six hundred thirty-nine million, four hundred eighty-four thousand, four hundred twenty-nine".