16840681469 has 2 divisors, whose sum is σ = 16840681470. Its totient is φ = 16840681468.

The previous prime is 16840681453. The next prime is 16840681477. The reversal of 16840681469 is 96418604861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15803004100 + 1037677369 = 125710^2 + 32213^2 .

It is an emirp because it is prime and its reverse (96418604861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16840681469 - 2⁴ = 16840681453 is a prime.

It is a super-2 number, since 2×16840681469² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16840681469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16840681409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8420340734 + 8420340735.

It is an arithmetic number, because the mean of its divisors is an integer number (8420340735).

Almost surely, 2^16840681469 is an apocalyptic number.

It is an amenable number.

16840681469 is a deficient number, since it is larger than the sum of its proper divisors (1).

16840681469 is an equidigital number, since it uses as much as digits as its factorization.

16840681469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 16840681469 in words is "sixteen billion, eight hundred forty million, six hundred eighty-one thousand, four hundred sixty-nine".