16843907489917 has 2 divisors, whose sum is σ = 16843907489918. Its totient is φ = 16843907489916.

The previous prime is 16843907489911. The next prime is 16843907489921. The reversal of 16843907489917 is 71998470934861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16744635864441 + 99271625476 = 4092021^2 + 315074^2 .

It is a cyclic number.

It is not a de Polignac number, because 16843907489917 - 2³⁹ = 16294151676029 is a prime.

It is a super-3 number, since 3×16843907489917³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16843907489911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8421953744958 + 8421953744959.

It is an arithmetic number, because the mean of its divisors is an integer number (8421953744959).

Almost surely, 2^{16843907489917} is an apocalyptic number.

It is an amenable number.

16843907489917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16843907489917 is an equidigital number, since it uses as much as digits as its factorization.

16843907489917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658409472, while the sum is 76.

The spelling of 16843907489917 in words is "sixteen trillion, eight hundred forty-three billion, nine hundred seven million, four hundred eighty-nine thousand, nine hundred seventeen".