16887555347009 has 2 divisors, whose sum is σ = 16887555347010. Its totient is φ = 16887555347008.

The previous prime is 16887555346889. The next prime is 16887555347011. The reversal of 16887555347009 is 90074355578861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13717927027984 + 3169628319025 = 3703772^2 + 1780345^2 .

It is a cyclic number.

It is not a de Polignac number, because 16887555347009 - 2¹² = 16887555342913 is a prime.

Together with 16887555347011, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16887555347009.

It is not a weakly prime, because it can be changed into another prime (16887555347059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8443777673504 + 8443777673505.

It is an arithmetic number, because the mean of its divisors is an integer number (8443777673505).

Almost surely, 2^{16887555347009} is an apocalyptic number.

It is an amenable number.

16887555347009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16887555347009 is an equidigital number, since it uses as much as digits as its factorization.

16887555347009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016000, while the sum is 68.

The spelling of 16887555347009 in words is "sixteen trillion, eight hundred eighty-seven billion, five hundred fifty-five million, three hundred forty-seven thousand, nine".