16840489517 has 2 divisors, whose sum is σ = 16840489518. Its totient is φ = 16840489516.

The previous prime is 16840489499. The next prime is 16840489537. The reversal of 16840489517 is 71598404861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16248345961 + 592143556 = 127469^2 + 24334^2 .

It is an emirp because it is prime and its reverse (71598404861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16840489517 - 2¹² = 16840485421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16840489537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8420244758 + 8420244759.

It is an arithmetic number, because the mean of its divisors is an integer number (8420244759).

Almost surely, 2^16840489517 is an apocalyptic number.

It is an amenable number.

16840489517 is a deficient number, since it is larger than the sum of its proper divisors (1).

16840489517 is an equidigital number, since it uses as much as digits as its factorization.

16840489517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 16840489517 in words is "sixteen billion, eight hundred forty million, four hundred eighty-nine thousand, five hundred seventeen".