16616010116989 has 2 divisors, whose sum is σ = 16616010116990. Its totient is φ = 16616010116988.

The previous prime is 16616010116977. The next prime is 16616010117013. The reversal of 16616010116989 is 98961101061661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16557127212025 + 58882904964 = 4069045^2 + 242658^2 .

It is a cyclic number.

It is not a de Polignac number, because 16616010116989 - 2⁹ = 16616010116477 is a prime.

It is a super-2 number, since 2×16616010116989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16616010176989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308005058494 + 8308005058495.

It is an arithmetic number, because the mean of its divisors is an integer number (8308005058495).

Almost surely, 2^{16616010116989} is an apocalyptic number.

It is an amenable number.

16616010116989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16616010116989 is an equidigital number, since it uses as much as digits as its factorization.

16616010116989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 55.

The spelling of 16616010116989 in words is "sixteen trillion, six hundred sixteen billion, ten million, one hundred sixteen thousand, nine hundred eighty-nine".