16620719459 has 2 divisors, whose sum is σ = 16620719460. Its totient is φ = 16620719458.

The previous prime is 16620719449. The next prime is 16620719503. The reversal of 16620719459 is 95491702661.

It is a weak prime.

It is an emirp because it is prime and its reverse (95491702661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16620719459 is a prime.

It is not a weakly prime, because it can be changed into another prime (16620719429) 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, 8310359729 + 8310359730.

It is an arithmetic number, because the mean of its divisors is an integer number (8310359730).

Almost surely, 2^16620719459 is an apocalyptic number.

16620719459 is a deficient number, since it is larger than the sum of its proper divisors (1).

16620719459 is an equidigital number, since it uses as much as digits as its factorization.

16620719459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 16620719459 in words is "sixteen billion, six hundred twenty million, seven hundred nineteen thousand, four hundred fifty-nine".