16704640020619 has 2 divisors, whose sum is σ = 16704640020620. Its totient is φ = 16704640020618.

The previous prime is 16704640020617. The next prime is 16704640020647. The reversal of 16704640020619 is 91602004640761.

It is a weak prime.

It is an emirp because it is prime and its reverse (91602004640761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16704640020619 - 2¹ = 16704640020617 is a prime.

It is a super-4 number, since 4×16704640020619⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 16704640020617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16704640020617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8352320010309 + 8352320010310.

It is an arithmetic number, because the mean of its divisors is an integer number (8352320010310).

Almost surely, 2^{16704640020619} is an apocalyptic number.

16704640020619 is a deficient number, since it is larger than the sum of its proper divisors (1).

16704640020619 is an equidigital number, since it uses as much as digits as its factorization.

16704640020619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 16704640020619 in words is "sixteen trillion, seven hundred four billion, six hundred forty million, twenty thousand, six hundred nineteen".